Fair Housing and how it applies to Vacation Rentals

[Maura Paler]

Does anyone know how to find out what housing and non-discrimination regulations apply to vacation rentals vs long term rentals? 

Had a potential 4 night renter tell me I must accept his wife's dog because it was a service dog, even though we advertise as an allergen free, no pet household? 

We are in NY. 

I've Googled it to death, can't find the answer. But did find something that says if we own more than 3 rental properties (we do) the rules are different, i.e. worse.