ANNOUNCEMENT!!! This will effect those of you participating in the Main Event at the East STS in New Jersey on November 18th, 2000. The following may shock, you, it may even amaze you. ... So here goes nothing, straight from the PokéGym and their anonymous contact, it's the deck rules for the East STS.
60 Cards Total Per Deck (This is your basic, obvious rule.)
You may have any amount of Basic Energy in your deck. (Another basic, obvious rule.)
No more than 3 of any single Trainer Card, Basic Pokemon, Stage 1 Evolution, Stage 2 Evolution, or Non-Basic Energy in your deck! (Meaning, you can't have 4 Wigglytuff in your deck! The limit is 3 of them, or ANY card per deck. Wowza!)
No more than 15 Trainers per deck. (Your basic, regular Prop15 rule right there.)
Un-Playable Card List (Otherwise known as BANNED Cards)
Ancient Mew (So suitable translation for it, plus, regular tournaments have it banned anyway.)
Any Jumbo Card (That's the Articuno, Moltres, and Zapdos, Pikachu Jumbo, and any other Japanese jumbo card.)
Foreign Cards and Expansion Sets
Foreign Cards may be used in a deck on a few guidelines:
If you have any Japanese cards in your deck, you MUST have opaque sleeves on ALL of your cards. (Opaque sleeves are the ones that you can only see the front side of them, and are colored like black or red or green or whatever.)
If you have ANY foreign card in your deck, you MUST have an English version of the card set aside from play. (Does card from England count as foreign cards? Anyway, I saw a lot of people at the West STS get busted for this. You HAVE to have an English card for reference.)
The following expansions may be used in your deck: Base Set 1, Base Set 2, Jungle, Fossil, Team Rocket, Gym: Heroes, and Gym: Challenge. Promo Cards #1-23 may all be used in decks. (That's basically all the English cards ever made by Wizards of the Coast.)
Errata Card List (Errata'd cards are cards with an updated ruling on them to make them evened out, if they were rendered unplayable by a printed mistake.)
Blaine's Charizard's (Gym: Challenge, #2/132) first Attack (Roaring Flames) reads, "Discard all (Fighting) Energy Cards but 1 attached to Blaine's Charizard." The correct text (and the way it will be played) is "Discard all (Fire) Energy Cards but 1 attached to Blaine's Charizard."
* Rocket's Minefield Gym's (Gym: Challenge, #119/132) text reads, "Whenever a player puts a Basic Pokemon onto his or her bench, from his or her hand, flip a coin. If tails, put damage counters on that Pokemon." The correct text (and the way it will be played) is "Whenever a player puts a Basic Pokemon onto his or her bench, from his or her hand, flip a coin. If tails, put 2 damage counters on that Pokemon."
The way the tournament will be played (time limits, etc.) will be announced at a later time.