Our CCRC corp, Seabury , Bloomfield CT, has a non-partisan policy, allowing political speakers only if both candidates for election are presented.
Our CCRA requests that political messagers use a sub-thread and NOT broadcast political messages to the community as a whole. There are separate threads for environmental issues, local politics, and RA governance committees.
No one regulates displays on the front of an apartment, and many show political causes ( BLM, Pride, etc.) in season.