The Beasts of the Bay generally follow Eternal Central's Old School 93/94 Deck Construction Rules.
However, we have a few differences. They are as follows:
(1) Maze of Ith is Unrestricted.
(2) Recall is Unrestricted.
(3) We have special errata for Falling Star. Falling Star's errata is as follows: "Choose any number of non-token creatures on the battlefield, then arrange them in the playing area in any way except that none of them may overlap. Flip Falling Star onto the playing area from a height of at least one foot. Falling Star deals 3 damage to each chosen creature it lands on. Tap all creatures dealt damage by Falling Star. If Falling Star doesn't turn completely over at least once during the flip, it has no effect."
Otherwise all the rules are the same as Eternal Central.
How not to flip a Falling Star