Conn. Gen. Stat. § 3-127: Negotiations concerning interstate watercourses.

The Attorney General is authorized, with the approval of the Governor, to negotiate and contract, in the name of the state, with any commission appointed by another state, or with any authorized agent thereof, concerning the use, allocation or diversion of any waters from streams or tributaries without the state of streams which in their natural course flow through, into or across the state.