Are custom rules allowed for VRC users to enter the world?

Some worlds describe user-defined rules when entering the world (e.g., using over 200000 polygonal avatars, using over 70 material counts, and replacing avatars twice)
If you violate this rule, you will kicked in the world.
Is it acceptable to restrict users’ rights like this?

Unless it’s the instance owner itself that set these rules, then no.
The world author is only allowed to provide advice for good (avatar) ethicate, but never enforce them on instances they have not personally started (public does not count as their instances)

Udon/World specific moderation guidelines

This is also a personal interpretation on it.