Except as otherwise specifically provided herein, the phrase "court of competent jurisdiction" as used in the compact shall mean, with reference to courts of this state, the supreme court, and said court is hereby given all necessary and appropriate jurisdiction to hear and determine any action or proceeding brought before it pursuant to appropriate provisions of the compact. As used in section 11.6 of the compact, the phrase "court of competent jurisdiction" shall mean, with reference to courts of this state, a court in which an appropriate proceeding under article seventy-eight of the Civil Practice Law and Rules may be brought. As used in clause one of subdivision (a) of section 15.1 of the compact, the phrase "court of competent jurisdiction" shall mean with reference to courts of this state, any court in which an action or proceeding of the class brought by the Susquehanna river basin commission may be heard and determined.