N.Y. Public Service Law § 89-p: Powers of the department

§ 89-p. Powers of the department. The department shall, with respect

to out of state water-works corporations which are affiliated with

in-state water-works corporations and which provide water to such

in-state corporations for eventual retail to New York consumers, keep

apprised of, attend and monitor, and, where possible, formally intervene

in rate cases brought by such out of state corporations before the

appropriate regulatory agency of such other state. The commission shall

consider and utilize information secured therefrom in determining

whether rate increases sought by such affiliated in-state corporations

are in the public interest.