Since 1 October 2015, Creos and Fluxys Belgium, in collaboration with their respective regulators ILR and CREG, have united the national markets of Luxembourg and Belgium into one Belux market. This integration, the first between two European Union member states, reflects the will of the European Union to create an European gas market without borders. Balansys, the joint venture between Creos and its Belgian counterpart Fluxys, will become the balancing operator in the Belux zone from 1 June 2020. In other words, it will be responsible for ensuring that the gas market is well supplied, without one of the two suppliers having to pay an entry fee for its gas on the other's market.