The Beasts of the Bay follow the Pacific Format 93/94 deck construction and play rules.
The Pacific Format rules are very similar to Eternal Central's Old School 93/94 Deck Construction Rules.
However, the Pacific Format has a couple differences. They are as follows:
(1) Maze of Ith is Unrestricted.
(2) Recall is Unrestricted.
Otherwise all the rules are the same as Eternal Central.
Note that the Pacific Format also uses the Eternal Central updated errata for Falling Star. (See: http://www.eternalcentral.com/updated-errata-and-wording-for-falling-star-chaos-orb-and-ring-of-maruf/ ) Also, note that under EC rules the player who casts Falling Star may rearrange any number of creatures on the battlefield before flipping it.
How not to flip a Falling Star