New York Laws
Article 4-B - Provisions Relating to Water
89-N - Defense in Case of Excessive Charges for Water.

§ 89-n. Defense in case of excessive charges for water. If it be
alleged and established in an action brought in any court for the
collection of any charge for water that a price has been demanded in
excess of that fixed by the commission or by statute in the municipality
wherein the action arose, no recovery shall be had therein, but the fact
that such excessive charges have been made shall be a complete defense
to such action.