17. Where pursuant to article 46 of and Schedule 6 to the Order the CAA proposes to impose or has imposed and not revoked subsidiary conditions in respect of an airport, these Regulations shall apply as if references to conditions included references to subsidiary conditions and references to the airport operator included, in relation to action taken by the CAA in respect of subsidiary conditions, references to any associated company of the airport operator to which a subsidiary condition relates or would relate if it were imposed.