Obligation to submit a proposal for authorisation of a merger of competitors to the Office for the Protection of Competition if the turnover of the competitors exceeds the statutory turnover limit. The merger of competitors is subject to the authorisation of the Office for the Protection of Competition if: a) the total net turnover of all the merging competitors achieved for the last completed accounting period on the Czech Republic market is higher than CZK 1.5 billion and at least two of the merging competitors achieved a net turnover of more than CZK 250 million each for the last completed accounting period on the Czech Republic market, or b) the net turnover achieved for the last completed accounting period on the Czech Republic market 1. in the case of a merger pursuant to Section 12(1), by at least one of the merging parties, 2. in the case of a merger pursuant to Section 12(2), by the competitor or part thereof over which control is being acquired, or 3. in the case of a merger pursuant to Section 12(5), by at least one of the competitors establishing a jointly controlled competitor, is greater than CZK 1 500 000 000 and, at the same time, the worldwide net turnover achieved for the last completed accounting period by the other merging competitor is greater than CZK 1 500 000 000.