As a domestic rabbit, the Polish is legal to keep in most places and is not subject to any breed-specific restrictions. Rules that affect ownership are general pet and livestock regulations rather than anything tied to the breed itself.
In many jurisdictions a pet rabbit requires no individual license. However, some local codes classify rabbits as livestock or cap the number of animals allowed per household, so it is worth confirming how local law treats rabbits before bringing one home.
This page is informational and is not legal advice. Because the rules differ from one locality to another, prospective owners should check the requirements that apply where they live.