Express language regarding landlords, property managers, advertisers and other financial supporters of pirate stations did not make it in the final version of the PIRATE Act in 2020.
However, FCC has taken the position that the statutory language regarding "willfully and knowingly does or causes or suffers to be done” such broadcasts effectively covers landlords and property managers, and are taking enforcement action accordingly:
https://docs.fcc.gov/public/attachments/DOC-369037A1.pdfThe agency also amended its rules, authorized by the PIRATE Act, to propose penalties “against any person who willfully and knowingly does or causes or suffers to be done any pirate radio broadcasting,” supporting this same enforcement effort.
The PIRATE Act defines “pirate radio broadcasting” as unlicensed transmission of communication (not in compliance with Part 15) between 535 and 1705 kilohertz, inclusive, or 87.7 and 108 megahertz, inclusive.