My ideas were to have a role playing session in game for customs. For example a roleplaying Kingdom where Each team needs at least 1 female champ and 1 male champ. Jobs are forest ranger, King and queen, servants, and guard.
Or roleplaying factions which is like the first one but with Demacia and Noxus.
Possibly a school where we have students teachers a principal.
Or maybe a doctor rp where each team is required at least one of the doctor skins,
Anyways i just wanted to know are we allowed to do this Riot?

Too complicated, but possible.