Thanks for your suggestions Jimmy and Kaindub.
I thought long and hard about taking formal action but didn’t with the hope of playing nice and not antagonising further, for want of inviting more volatile behaviour. I also took comfort in him not showing up to the mid-week open. That said, he has since had the managing agent send a letter to my sales agent saying that the “pet-friendly” references in the ad are misleading, on the basis that there is an approval process under the by-laws, and references must be removed.
Again, not to antagonise, we complied, on the basis that if buyers are interested in the plan’s position on animals, we can refer them to the by-laws.
That being said, I’m pretty annoyed that the managing agent sent the letter purporting to be from the Committee (I’m on the Committee and wasn’t consulted) and that the Chair continues to try and control things that don’t affect him whatsoever.