Vojtěch Blažek, Attorney at Law
Bělina & Partners Law Firm, s.r.o.
(This article was published in the journal Antitrust 2/2026, pp. 47–49)
The cornerstone of the domestic legal framework for the protection of competition—Act No. 143/2001 Coll., on the Protection of Competition and on Amendments to Certain Acts, as amended (hereinafter also referred to as the “ZOHS”)—could undergo a significant amendment in the foreseeable future. This is evidenced by two proposals submitted to amend the ZOHS, in particular the draft law amending certain laws within the scope of the Office for the Protection of Economic Competition (Ref. No. ÚOHS-07668/2026/441), which was submitted at the end of March for interministerial review[1]. According to the author of this article, the proposal submitted by Members of Parliament Ivan Bartoš and Olga Richterová to enact a law amending Act No. 143/2001 Coll., on the Protection of Economic Competition and on Amendments to Certain Acts (the Act on the Protection of Economic Competition), as amended, and Act No. 374/ 2015 Coll., on Restructuring Procedures and Crisis Resolution in the Financial Market, as amended (Chamber of Deputies Print No. 5), which is in the early stages of deliberation in the Chamber of Deputies and on which the government has adopted a favorable opinion (Government Resolution No. 945 of December 3, 2025).
Among other things, the parliamentary bill provides for the introduction of a new instrument in the area of mergers, which the author discusses in this article, as well as new options for addressing structural problems in competition. For the sake of completeness, it should be noted that the legal provisions of the parliamentary bill amending the Act on the Protection of Economic Competition are identical to those of the government’s amendment to the Act in question, which was submitted to members of the Chamber of Deputies during the previous legislative term on November 15, 2024, as Chamber of Deputies Print No. 853/0; however, that amendment was not debated.
Call-in Procedure for Approving Mergers of Competitors
The Office for the Protection of Economic Competition (hereinafter also referred to as “ÚOHS”) may intervene in cases of distortion[2] of competition by competitors through prohibited agreements, abuse of a dominant position, or mergers of competitors. It is precisely the potential legislative changes in the area of merger control that have been the subject of expert discussion[3] in recent years, the conclusions of which have been reflected in the draft bill under consideration.
Under current law, a merger of competitors that meets any of the three statutory definitions of a merger set forth in Section 12 of the Act on the Protection of Competition is subject to approval by the ÚOHS only if – the notification criteria under Section 13 of the Act on the Protection of Competition are simultaneously met; this section contains two separate criteria based on the net turnover of the competitors involved in the merger for the most recent fiscal period. The term “net turnover” is defined in Section 14 of the Act on the Protection of Competition. The most recent completed period is considered to be the accounting period immediately preceding the accounting period in which a legal or other event occurred or is to occur, as a result of which the concentration of competitors takes place. With regard to the definition of the term “accounting period,” one must rely on the definition contained in Section 3(2) of the Accounting Act[4], according to which an accounting period is defined as twelve consecutive months. The accounting period usually coincides with the calendar year; however, it may also be defined as a fiscal year beginning on the first day of a month other than January.[5]
The first of the notification criteria under current legislation concerns the net turnover achieved by the merging competitors on the Czech market and is met when – the total turnover of all merging competitors exceeds 1.5 billion CZK and, at the same time, at least two of the merging competitors have achieved a net turnover exceeding 250 million CZK. The second existing notification criterion relates to both net turnover within the territory of the Czech Republic as well as global turnover, and is met if one of the parties to the transaction achieved a net turnover exceeding 1.5 billion CZK on the Czech market and, at the same time, the global net accounting turnover of another of the merging competitors exceeds 1.5 billion CZK.
A merger of competitors that does not meet any of the above-mentioned turnover criteria is not subject to approval by the Office for the Protection of Competition (ÚOHS). The current rigid legal framework may be subject to change, as the proposed amendment to the Act on the Protection of Competition (ZOHS) provides for the introduction of a so-called “call-in” regime, under which mergers that do not currently meet the applicable turnover criteria but have the potential to distort competition would also be subject to approval by the ÚOHS.
The “call-in” model for approving mergers of competitors is to be regulated in a new provision, Section 13a of the Act on the Protection of Competition, and would authorize the Office to request merging or already merged competitors to file an application for merger approval in cases where the merger in question does not meet the existing turnover criteria under Section 13 of the Act on the Protection of Competition, but the following conditions are cumulatively met:
i. there is a suspicion that the merger in question could result in a significant distortion of competition, in particular by creating or strengthening a dominant position of the merging competitors or any one of them;
ii. the total net turnover of the parties to the transaction on the Czech market for the most recent completed fiscal year exceeds CZK 1.5 billion;
iii. at least two of the competitors achieved a net turnover on the Czech market exceeding CZK 100 million for the most recent completed fiscal year.
The Office for the Protection of Competition (ÚOHS) should be authorized to issue a call for the submission of a merger notification under the “call-in” procedure either during the implementation of the merger or after its completion, but no later than 6 months from the date of the transaction. In the request to file an application for merger clearance, the ÚOHS would set deadlines for the parties to the transaction to file the application, which could not be shorter than 30 days. The bill also provides that, upon delivery of the Office’s call to file an application for merger clearance, a “standstill” would apply—that is, a prohibition on proceeding with the merger—which would apply only to mergers that have not yet been implemented. In a situation where the ÚOHS would request the filing of an application for merger clearance for a merger that has already been implemented, the prohibition on premature implementation of a merger under Section 18(1) of the Act on the Protection of Competition would, by its very nature, not apply.
The bill provides that merging competitors participating in a transaction falling under the “call-in” turnover criteria -in model—i.e., a total net turnover of all competitors in the Czech market exceeding 1.5 billion CZK and at least two competitors with a net turnover in the Czech market exceeding 100 million CZK—could voluntarily notify the ÚOHS themselves so that it may assess whether their merger could result in a significant distortion of competition.
When assessing a merger under the call-in regime, all rules and procedures applicable to the current assessment of compliance with the turnover criteria under Section 13 of the Act on the Protection of Competition (ZOHS) should apply, with a single exception arising from the very definition of mergers subject to the call-in regime. This exception concerns the application of the simplified merger clearance procedure under Section 16a of the Act on the Protection of Competition, which will not be applicable. The reason is that the simplified procedure applies only in cases where there is no concern about a substantial distortion of competition. The proposed amendment to the call-in regime, on the other hand, applies to situations where there is a suspicion that a substantial distortion of competition could occur.
Regulation of Mergers of Competitors Through Measures of a General Nature
A completely new legal instrument that the Office for the Protection of Competition (ÚOHS) would have at its disposal under the proposed legislation—among other things, for the purpose of regulating mergers among competitors—is a measure of a general nature. A measure of a general nature is a specific administrative act that has been part of our legal system since January 1, 2006, when the current Administrative Procedure Code took effect. [6] A measure of general application is neither a legal regulation nor a decision[7] and is characterized by the fact that it can be used to impose specific binding rules on a generally defined group of addressees.
The ÚOHS would now be authorized, through measures of general application and following the results of a sector inquiry, to determine:
i. the relevant market and the criteria for mergers of competitors subject to approval by the ÚOHS, if, following a sector inquiry, it is determined that further mergers of competitors not subject to ÚOHS approval under Section 13 of the Act on the Protection of Economic Competition could significantly distort competition in a specific market; or
ii. the relevant market in which the ÚOHS will be authorized to impose remedial measures on competitors, if, following a sector inquiry, it is determined that competition is being significantly distorted in a particular market and it appears unlikely that the application of other ÚOHS instruments could lead to its effective and lasting elimination.
In both cases, the ÚOHS could issue a measure of general application for a maximum period of 3 years, with the possibility of (even repeated) extension, provided that the legal conditions for its issuance in the relevant market continue to exist.
Through measures of a general nature, the ÚOHS could regulate the merger of competitors in situations where, following a sector inquiry, the final report concludes that a potential further merger of unspecified competitors—which does not meet the notification criteria under the current Section 13 of the Act on the Protection of Economic Competition, could significantly distort competition in the relevant market. This refers to a situation where the Office is able to identify a threat to competition in a specific market, but cannot yet identify the specific competitors whose merger would give rise to such a threat to competition.
According to the illustrative list, a significant distortion of competition justifying the issuance of a measure of general application could occur, for example, in particular when there is a very limited number of competitors operating in the relevant market who possess significant market power, especially in comparison with other competitors operating in that market, if there are legal or other significant barriers to entry for additional competitors in the relevant market; if there is limited ability to switch to other suppliers or customers in the relevant market; or if there is significant information asymmetry in the relevant market among competitors, their suppliers or customers, or consumers.
Markets in which a specialized regulator with its own regulatory tools operates would be excluded from the Office for the Protection of Competition’s (ÚOHS) authority to issue measures of a general nature; consequently, a conflict of jurisdiction could arise, or potential regulatory duplication could be counterproductive. For this reason, markets supervised by the Czech Telecommunications Office, the Energy Regulatory Office, and the Czech National Bank would be excluded from the scope of general measures issued by the ÚOHS.
No appeal or other legal remedy may be filed against a general measure. [8] Its compliance with legal regulations may be assessed in review proceedings, which may be initiated only ex officio—either by decision of the Office or upon a motion by an affected competitor. However, competitors have no legal right to the initiation of review proceedings. A resolution to initiate review proceedings must be issued within one year of the measure’s effective date. The only “enforceable” remedy through which competitors may seek a review of a measure of general application issued by the Office for the Protection of Competition (ÚOHS) is a petition for its annulment in administrative court.[9] A petition for the annulment of a measure of general application by an administrative court must also be filed no later than one year from the date of its entry into force. [10]
Draft Amendment Prepared by the ÚOHS
At the end of March 2026, the ÚOHS submitted a draft amendment to the ZOHS for interministerial review. This proposal is a further elaboration of the bill that the ÚOHS had already submitted in 2024; however, it was not debated in the Chamber of Deputies of the Parliament of the Czech Republic during the previous legislative term—see the aforementioned government bill, Chamber of Deputies Print No. 853/0. Compared to the original 2024 draft, the individual proposed provisions are now regulated in greater detail, based on feedback from experts and taking into account the experience of foreign competition authorities.[11]
The ÚOHS’s draft also provides for the introduction of a “call-in” model through a new Section 13a, which would authorize the ÚOHS to invite merging or already merged competitors to file an application for merger clearance in cases where the merger in question does not meet the turnover criteria under Section 13 of the Act on the Protection of Competition, but the following conditions are cumulatively met:
i. there is a suspicion that the merger in question could result in a significant distortion of competition, particularly because it would create or strengthen a dominant position of the merging competitors or any one of them, and
ii. the total net turnover of all merging competitors achieved during the most recent completed fiscal year on the Czech market exceeds 2.5 billion CZK.
Unlike the parliamentary draft amendment to the Act on the Protection of Competition, the condition requiring that at least two of the competitors achieved a net turnover exceeding CZK 100 million on the Czech market during the most recent completed fiscal year has been omitted in the case of the call-in model. At the same time, the criterion for the total turnover of all merging competitors in the Czech Republic has been raised to 2.5 billion, which is due to the fact that the Office for the Protection of Competition’s (ÚOHS) proposal also provides for an increase in the existing turnover criteria under Section 13 of the Act on the Protection of Competition.
The six-month deadline from the completion of the transaction for applying the “call-in” model, the minimum 30-day deadline for filing a merger notification, the so-called standstill period, and the option for voluntary notification by the merging parties are regulated in the same manner as in the parliamentary bill.
The Office for the Protection of Competition’s (ÚOHS) draft also regulates the introduction of measures of a general nature. The ÚOHS could issue measures of a general nature for a maximum period of 3 years if it finds that there is a long-term failure of effective competition in the relevant market under investigation, with the aim of strengthening competition; to this end, it could impose, for example, the following non-structural measures: an obligation to provide access to data, interfaces, networks, or other facilities; an obligation to establish transparent, non-discriminatory, and open norms and standards; an obligation to amend certain types of agreements or contractual arrangements; an obligation to disclose information that reduces information asymmetry; an obligation to set requirements for business relationships between competitors; an obligation to separate the accounting departments of business units or divisions; a prohibition on the unilateral disclosure of information that would facilitate coordinated conduct; a prohibition on business practices that reduce consumers’ ability to make informed choices; or a prohibition on or restriction of the ability of competitors to form alliances.
Similar to the parliamentary bill, the ÚOHS could issue measures of a general nature for a maximum period of 3 years, with the possibility of (even repeated) extension as long as the legal conditions for their issuance remain in effect.
Unlike the parliamentary bill, the ÚOHS’s proposal does not exclude from the ÚOHS’s authority to issue measures of a general nature those markets in which a specialized regulator operates. The ÚOHS would be authorized to issue measures of a general nature in these markets; however, it would be required to obtain the relevant regulator’s opinion in advance.
Conclusion
The current parliamentary amendment to the Act on the Protection of Economic Competition was distributed to members of parliament as Chamber of Deputies Print No. 5/0 on November 6, 2025, and is awaiting its first reading in the Chamber of Deputies. We are thus at the beginning of the legislative process. It is clear that the originally proposed effective date of the amendment, July 1, 2026, will not be met. The amendment drafted by the Office for the Protection of Economic Competition (ÚOHS) has completed the public comment period. It is expected that the two proposals may draw inspiration from or overlap with one another during the legislative process.
The goal of both legislative proposals is to enable a more flexible review of mergers between competitors in cases where the existing notification criteria are not met, and thus the mergers in question are not subject to any review by the ÚOHS. The introduction of the call-in model responds to practical needs, as the ÚOHS has received several requests over the past 10 years to review mergers of competitors that did not meet the existing turnover criteria but could have resulted in a distortion of competition. [12] Given that the draft amendment prepared by the ÚOHS—unlike the parliamentary proposal—does not require that at least two of the competitors have achieved a net turnover exceeding 100 million CZK on the Czech market during the most recent completed fiscal year for the call-in model to apply, it can be considered more flexible. On the other hand, however, the ÚOHS plans to raise the criterion for the total turnover of all merging competitors within the territory of the Czech Republic to 2.5 billion. However, considering that the current turnover criteria were established more than 20 years ago and, according to the ÚOHS, the number of cases decided through so-called simplified proceedings is increasing—since the mergers under review have a completely negligible impact on the relevant markets[13]—this increase can be accepted.
Both proposed new mechanisms in the area of mergers—the “call-in” regime and the possibility of regulation through measures of a general nature—can be viewed positively from the perspective of competition protection. The existing turnover criteria alone may not necessarily reflect the position of the merging competitors in the relevant market; consequently, transactions may occur that, due to insufficient turnover, are not subject to approval by the Office for the Protection of Competition (ÚOHS), even though they may have the potential to significantly distort competition in the relevant market.
Regarding the proposed “call-in” model, it is worth noting that the turnover thresholds for its application are specified—both in the parliamentary bill and in the draft prepared by the ÚOHS—solely in relation to turnover within the Czech Republic. In the author’s opinion, as is the case with the existing notification criteria, the call-in model should also include criteria based not only on domestic turnover but also on the global turnover of the merging competitors.
Abstract:
[Vojtěch Blažek: Mergers of competitors in light of the upcoming amendment to the Act on the Protection of Competition]
This article focuses on two current legislative proposals to amend the main Czech law governing the protection of competition, Act No. 143/2001 Coll., on the Protection of Competition and on Amendments to Certain Acts, as amended (hereinafter also referred to as the “ZOHS”), specifically regarding the issue of mergers among competitors. Under current law, a merger of competitors is subject to approval by the Office for the Protection of Competition (hereinafter also referred to as “ÚOHS”) only if the notification criteria regarding the turnover of the merging competitors are met. A merger of competitors that does not meet the specified turnover limit is not subject to approval by the ÚOHS, even if it has the potential to disturb competition. This is set to change under the proposed legislation, as both draft laws provide for the introduction of a so-called “call-in” regime, under which mergers of competitors that do not currently meet the applicable turnover criteria but have the potential to disturb competition would also be subject to approval by the ÚOHS. A completely new tool that the ÚOHS should have at its disposal under the proposed legislation, among other things for the purpose of regulating mergers, is a Measure of a General Nature. A Measure of a General Nature is a specific administrative act that is neither a legal regulation nor a decision and is characterized by the fact that it can be used to impose specific binding rules on a generally defined group of addressees. Both of the legislative proposals under discussion anticipate the use of this instrument not only to address the issue of mergers but also to resolve other structural problems in the field of competition.
[[1] For a discussion of the draft, see Mňuk, J., Cervanová, A., Mrózek, D., and Svoboda, M., “A New Era of Czech Competition Law: An Anatomy of the Draft Major Amendment to the Act on the Protection of Competition,” ANTITRUST, No. 1/2026, pp. 14–25.
[2] Legislative abbreviation for the exclusion, restriction, or other distortion or threat to competition—see the heading of Section 1(1) of the Act on the Protection of Competition (ZOHS).
[3] On July 10, 2024, the Office for the Protection of Competition (ÚOHS) published a notice on its website announcing the launch of a public consultation on a possible revision of the rules for authorizing mergers of competitors; available here: https://uohs.gov.cz/cs/informacni-centrum/tiskove-zpravy/hospodarska-soutez/3941-verejna-konzultace-k-navrhovanym-zmenam-v-oblasti-spojovani-soutezitelu.html.
[4] Act No. 563/1991 Coll., on Accounting, as amended.
[5] See the Competition Protection Office’s Notice on the Calculation of Turnover for the Purposes of Reviewing Mergers of Competitors, available here: https://uohs.gov.cz/download/Legislativa/HS/SoftLaw/Oznameni_o_vypoctu_obratu.pdf
[6] Act No. 500/2004 Coll., the Administrative Procedure Code, as amended.
[7] Section 171(1) of the Administrative Procedure Code.
[8] Section 173(2) of the Administrative Procedure Code.
[9] Section 101a et seq. of Act No. 150/2002 Coll., the Code of Administrative Procedure, as amended.
[10] Section 101b(1) of the Code of Administrative Procedure.
[11] https://uohs.gov.cz/cs/hospodarska-soutez/novela-zohs-2026.html.
[12]https://uohs.gov.cz/cs/informacni-centrum/tiskove-zpravy/hospodarska-soutez/3941-verejna-konzultace-k-navrhovanym-zmenam-v-oblasti-spojovani-soutezitelu.html.
[13] https://uohs.gov.cz/cs/hospodarska-soutez/novela-zohs-2026.html.

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