COPA has prepared these instructions and the form because of the regulation that became effective January 1, 2017 making consultation necessary when improving or building new aerodromes. Registered aerodromes have been in the CFS but in the case of unregistered aerodromes there is no proof that the aerodrome existed prior to January 1, 2017. Hopefully by completing the form and sending the information to TC and of course keeping a copy, any problems that could arise as to the age of the aerodrome will be eliminated. If you know of any person or community who has an unregistered aerodrome please have them complete the form as per the instructions. The instruction page explains the situation better than I can do.