Where a fine is imposed pursuant to articles L. 242-5 and L. 242-6, following a request for mutual assistance under Article L. 511-10 involving a large-scale or EU-wide infringement, pursuant to Article 21 of Regulation (EU) 2017/2394 of the European Parliament and of the Council of 12 December 2017 on cooperation between national authorities responsible for the enforcement of consumer protection laws, its amount may be increased to 4% of average annual turnover, calculated on the last three annual turnover figures known on the date of the facts.