ISO-NE, NEPOOL and the PTO AC jointly submit, pursuant to Section 205 of the FPA, Tariff changes related to their Compliance Changes filed in response to Orders 2023 and 2023-A (see ER24-2009), but that may be considered outside those orders’ compliance requirements, including revisions to: (i) the SGIP in Schedule 23 (designed to align Schedule 23’s SGIP with the LGIP in Schedule 22 and include Small Generating Facilities in the new Cluster Study Process); (ii) Schedule 25 (to ensure alignment with Schedule 22 and to include ETUs in the Cluster Study Process); and (iii) Sections II.19 and II.34 of the OATT (to require that System Impact Studies related to Regional Transmission Service requests take place in the Cluster Study incorporated as part of the Cluster Study Process).