Me. Rev. Stat. tit. 38, § 491

It is agreed between the signatory states that this compact shall apply to streams, ponds and lakes which are contiguous to 2 or more signatory states or which flow through 2 or more signatory states or which have a tributary contiguous to 2 or more signatory states or flowing through 2 or more signatory states, and shall apply to tidal waters ebbing and flowing past the boundaries of 2 states. <div