sydney, glad to hear that they will trade if its a drake. I have always had more ducks than drakes, so no problem with that. But I have heard of people having problems with drakes and their chickens if they don't have the ducks to keep them happy. Clip the wings so they don't fly off somewhere, that is what has caused this law to go into effect, ferral Muscovies. Keep your birds on your property at all times.
To answer some of the other questions here, this is a Federal Law not various state laws. The law is in effect now, however it is not being inforced at this time. The law is supposed to have a revision sometime this year. The Fed Migratory Bird and Waterfowl was not aware that so many people raised Muscovies for meat birds and the changes will address that issue and maybe more. Right now all Muscovies need to be identified and will need to be reported along with other migratory birds that are kept . This law went into effect April 1st, 2010 nationally. The law does state how it will be enforced by each state.
You don't have to read the whole thread, just go to the Fed Law and read it - get that link from the Muscovy Law thread.