Canine-wild animal hybrids in Pima County must be registered effective October 21, 2006. If a dog is part wolf or part coyote it must be registered.
For information on registration requirements call Pima County Animal Care Center at (520) 724-5900.
Sources:
"Every wolf-dog has his day - now he needs papers, too." Tucson Citizen Morgue (1992-2009). (No longer available.)
Title 6 - Animals / Chapter 6.05 - Regulations Concerning Canine-Wild Animal Hybrids | Pima County, Arizona Code of Ordinances | American Legal Publishing Corporation
Pima County Animal Care Center | pima.gov
Find the information you need by calling the library's Infoline at 520-791-4010 or by sending your question to Ask a librarian.