; or (D) any construction, deployment, or addition of a grid enhancing asset to a transmission facility or a transmission system that eliminates or reduces the need to carry out any of the activities described in subparagraphs (A) through (C). (38) Participant funding The term participant funding means any cost allocation method under which an interconnection customer is required to pay, without reimbursement, all or a disproportionate amount of the costs of a network upgrade that is determined by the Commission to be necessary to ensure the reliable interconnection of the interconnection customer’s generating facility or energy storage project. (39) Transmission planning region The term transmission planning region means a region for which electric transmission planning is appropriate, as determined by the Commission, including a region approved by the Commission to meet the requirements of the final rule titled Transmission Planning and Cost Allocation by Transmission Owning and Operating Public Utilities published in the Federal Register on October 4, 2012 (77 Fed. Reg. 60689). (40) Transmission system For purposes of sections 224, 226, 227, and 229, the term transmission system means a network of transmission facilities used for the transmission of electric energy in interstate commerce. . 102. Improvement of interregional electric transmission planning Part II of the Federal Power Act ( 16 U.S.C. 824 et seq. ) is amended by adding at the end the following: 224. Improving interregional electric transmission planning (a) In general Not later than 18 months after the date of enactment of this section, the Commission shall issue regulations requiring each Transmission Organization to, not later than 3 years after the date of enactment of this section and at least every 3 years thereafter, file with the Commission a plan that identifies, and to facilitate the construction of, interregional electric transmission projects that are efficient, cost-effective, and broadly beneficial. (b) Considerations In determining