I would check the state's or province's rules for that. It may vary, but usually you must keep some portion that identifies what sex the game was, and of course keep the tag. Should keep the rack too, to prove it was legal. In most states when transporting game, the tag must be attached to that game animal, regardless of whether its gutted, skinned or butchered.
As Cowgal said that would be a provincial law. Saskatchewan uses a two-tag system, for every licence you're issued a meat seal and a head/hide seal. The meat seal must remain affixed until butchering, the head/hide seal must remain affixed until min 31 Mar.
Let me start off by saying I am not a farmer.
I am a deer hunter and I do own a tractor and have all of the equipment - but that does not make you a farmer any more than standing in the garage makes you a car - well, you get the picture!
Having said that - and with most of my ineptitude fairly well hidden - I do think that buckwheat is one of the most under rated cover crops out there.
I say cover crop because I see mixed results as it relates to the deer eating the plants.