In particular, the rules for functional unbundling, governed first by AEEG resolution 22 June 2015, and then by AEEGSI resolution 296/2015/R/com, set the requirements for vertically integrated companies that operate in the sectors of electricity and methane:  the neutrality of the management of the infrastructures under concession;  the non-discriminatory management of the commercially sensitive information, relevant for the correct development of competition;  the absence of subsidies crossing over between activities, in particular between those subject to tariff regulation and those carried out on the basis of the free market.