; (ii) to make the transmission facilities and transmission technologies more efficient; or (iii) to increase the transfer capacity of the transmission facilities and transmission technologies. (3) Secretary The term Secretary means the Secretary of Energy. 3. Shared savings incentive for grid-enhancing technologies (a) Definition of developer In this section, the term developer , with respect to grid-enhancing technology, means the entity that pays to install the grid-enhancing technology. (b) Establishment of shared savings incentive Not later than July 1, 2025, the Commission shall promulgate a final rule to implement section 219(b)(3) of the Federal Power Act ( 16 U.S.C. 824s(b)(3) ) by providing a shared savings incentive that returns a portion of the savings attributable to an investment in grid-enhancing technology to the developer of that grid-enhancing technology, in accordance with this section. (c) Requirements (1) In general The Commission shall determine the percentage of savings attributable to an investment in grid-enhancing technology that can be returned to the developer of that grid-enhancing technology pursuant to the shared savings incentive established under subsection (b), subject to the condition that the percentage is not less than 10 percent and not more than 25 percent. (2) Time period for recovery The shared savings incentive established under subsection (b) shall return a percentage, determined in accordance with paragraph (1), of the applicable savings to the developer of the applicable grid-enhancing technology over a period of 3 years. (d) Eligibility Subject to subsection (e), the shared savings incentive established under subsection (b) shall apply with respect to— (1) any developer, with respect to the investment of that developer in grid-enhancing technology that is installed as described in section 2(2)(B); and (2) any grid-enhancing technology, including— (A) grid-enhancing technology that relates to new transmission facilities or technologies