The European Commission has also adopted a Delegated Regulation regarding RTS on the criteria for establishing when an activity is considered to be ancillary to a firm's main business. MiFID II exempts persons dealing on own account or providing investment services to clients in commodity derivatives and emission allowances, provided that activity is ancillary to their main business, and their main business is not the provision of investment services or banking activities. The Delegated Regulation will apply from 3 January 2018.