@Tim Bartel any cat or dog over the age of 1 year is considered an adult and at that point several behavioral problems have been corrected and they should largely be up to date with pet vaccinations.

Still waiting for that vaccine to hit the market.

I attach this to the lease and it covers all aspects of owing a pet including vaccinations etc.

Require them to provide documentation that their animal is licensed, vaccinated, and flee free2.

Make sure it's spayed or neutered, and registered - which also insures it's up to date on vaccinations. 

If you can send me info on the dog (spay/neuter, vaccine, license # - whatever you normally require) and a copy of your nephews relocation orders, you can keep the dog.

Last I heard private business can refuse entry if you do not have a mask or a vaccine, even if you have a disability that prevents you from doing so. 

That may help you in easy turn around, tossing area rugs and mats after a multi year tenancy, and vaccine and damp dust....best of luck...

You can still ask to see the animal's county license and vaccinations as that is a legal requirement for all animals, service animal or not. 

You can read the details and submit comments to HUD here:  https://www.federalregister.go...Given that vaccines, jobs, and housing assistance is widely available, I question the need for such a ruling.