NYS Power System. All facilities of the NYS Transmission System, and all those Generators located within the NYCA or outside the NYCA, some of which may be from time-to-time subject to operational control by the ISO. NYS Transmission System. The entire New York State electric transmission system, which includes: (1) the Transmission Facilities Under ISO Operational Control; (2) the Transmission Facilities Requiring ISO Notification; and (3) all remaining transmission facilities within the NYCA.