According to this blog post by Fandom staff
a new Fandom Policy will take effect from April 1st, 2021. This Policy requires every Fandom community to have their own set of easily found Rules. The blog post also states that this help page
https://community.fandom.com/wiki/Help:Wiki_Rules_and_Blocking_Policy
can be used as a reference point for new Rules.
Every active user of this community is encouraged to read both publications and share their thoughts and suggestions in the comments.