; and (xi) the elimination of arbitrary project voltage, size, or cost requirements for interregional solutions; and (B) regardless of the regulatory or business model of the entity developing the transmission project; and (3) the use of cost allocation methodologies that— (A) reflect the multiple benefits provided by interregional transmission solutions, including economic, reliability, resiliency, operational benefits; and (B) assign costs broadly to customers based on the multiple benefits described in subparagraph (A) received by customers. (b) Recovery of costs The Commission shall allow a transmission developer of an interregional transmission project that meets the criteria described in subsection (a)(2)(A) to submit to the Commission a request to recover the cost of the project if the transmission developer demonstrates to the satisfaction of the Commission that— (1) the project connects more than 1 planning region; (2) no interregional plan that meets the criteria described in subsection (a)(2)(A) has been adopted by the connected planning regions; and (3) the benefits of the project outweigh the costs of the project. (c) Rulemaking Not later than 18 months after the date of enactment of this Act, the Commission shall promulgate a final rule to implement this section.