; and (II) net demand in that power grid region or service area; by (ii) net demand in that power grid region or service area. (B) Clarification As of November 2023, a reserve margin falling within the range from 15 percent to 25 percent is typical for a power grid region or service area. (11) Power grid The term power grid means that portion of an Interconnection (as defined in section 215(a) of the Federal Power Act ( 16 U.S.C. 824o(a) )) that is located within the United States, including the relevant portion of each of the following: (A) The Eastern Interconnection. (B) The Western Interconnection. (C) The Texas Interconnection. (12) Power grid region The term power grid region means a geographic area— (A) located within a power grid