D.15.1- Can be composed of cards from any edition of the basic set from Sixth Edition on, plus any expansion of Magic from Tempest and newer. Collector's Edition cards are not allowed. Promotional cards are not allowed. The poker cards are not allowed (despite the April Fools article in the Duelist). The Championship decks are not allowed. To be more clear, Arabian Nights, Antiquities, Legends, The Dark, Fallen Empires, Ice Age, Homelands, Mirage, Visions, Weatherlight, Limited Edition, Unlimited Edition, Revised Edition, Fourth Edition, Fifth Edition, and Chronicles are disallowed unless they were reprinted in an allowed set.
D.15.2- Portal or Starter cards are not allowed unless they have the same name as a legal card. In this case, they play as the legal card text and not the Portal or Starter card text. [Duelist Magazine #18, Page 44]
D.15.3- New card sets become effective on the first day of the month following their introduction. If a set is released after the 15th day of a month, then the set's effective date is pushed out to the first of the second month. For example, a set released on January 8th is legal on February 1st, and one released on January 25th is legal on March 1st. [Tournament Rules 1997/10/01] [bethmo 1999/02/24]
D.15.4- Minimum of 60 cards in a deck. [Tournament Rules 1997/10/01]
D.15.5- Optional 'sideboard'. If you have one, it must be exactly 15 cards. [Tournament Rules 1997/10/01]
D.15.6- No more than 4 of any card (by name) which is not a basic land can be in the combination of deck and sideboard. Cards with different art or in different languages or from different prints but which are the same card are considered the same. [Tournament Rules 1997/10/01]
D.15.7- There is no 'restricted' list.
D.15.8- The 'banned' list includes all cards from banned sets that have not been reprinted in a more recent set. [Tournament Rules 1997/10/01]
D.15.9- These cards are explicitly banned even though they are from legal sets: Dark Ritual, Mind Over Matter, Windfall, Demonic Consultation, Replenish, Yawgmoth's Bargain, Earthcraft, Survival of the Fittest, Yawgmoth's Will, Lotus Petal, Time Spiral, Memory Jar, Tolarian Academy.
D.15.Ruling.2- Square edged cards from the Collector's Editions are not legal.
D.15.Ruling.3- Silver bordered cards from Unglued are not legal.
D.15.Ruling.4- Championship deck cards with the non-standard back are not legal.
Note- The DCI originally released this tournament format on 1997/05/01 as a replacement for Type 1.5 but decided on 1997/06/01 to change this decision and support both formats.