From the Rollback Rumble Ruleset, modified with the above WiFi relaxed rulings:

Full ruleset, with exceptions to and additional clauses noted below: https://tinyurl.com/MIOMruleset

Smurfing is banned.

WiFi is allowed, but in the scenario of lag spiking or assorted issues preference will be given to the corded connection.

Controllers such as the smashbox, B0XX, and other box-style options are allowed

No texture packs/custom skins that provide a competitive advantage

Diet Melee and Crystal Melee are allowed

Vanilla Melee ISO only

Singles

Wobbling is banned; wobbling = grabbing an opponent and inputting a series of 4 or more pummels, between each of which the opponent is hit with at least one non-pummel hitbox plausibly locking them in continuous hitstun Freezing and infinite stalling are also banned

LGL of 60 per game.

Starter stages: Yoshi’s Story, Fountain of Dreams, Battlefield, Dream Land, Pokemon Stadium (Frozen)

Counter-pick stage: Final Destination.