Well, you guys are doing your typical B.S. This is what I did and it worked for me. The cat was tagged BEFORE the end of the season. I don't know why guys have to try to be so opinionated about something you don't have the facts about. Gives us a break. If you guys are such experts, then maybe you should be a taxidermist. 
Damn . . . . . CAMPMEAT take a chill pill or a happy pill or something. Maybe lay off the alcohol.
Humptulips IS AN EXPERT when it comes to small game and CITIES.
Also what a couple have said about freezing a cat whole is also true. Putting them in the freezer whole doesn't give them an unlimited amount of time to have them mounted. They will freezer burn. They are a thin skinned animal and they will freezer burn faster than a Big Game animal. Ears are typically the first thing to start freezer burning. Than the toes. These thin skinned animals can be a real PITA to split, turn, and flesh when they are freezer burned.
I personally wouldn't leave them in the freezer longer than you have to. You should be pretty safe for 6 months as long as you properly wrap it to prevent the freezer burn.
. . . . . .and that is coming from a TAXIDERMIST!