as determined by the Commission, such as a region established pursuant to the guidance contained in the final rule of the Commission entitled Transmission Planning and Cost Allocation by Transmission Owning and Operating Public Utilities (76 Fed. Reg. 49842 (August 11, 2011)). (9) Transmission provider The term transmission provider means a public utility (as defined in section 201(e) of the Federal Power Act ( 16 U.S.C. 824(e) )) that owns, operates, or controls 1 or more transmission facilities. 4. Transmission planning and cost allocation (a) Rulemaking Not later than 18 months after the date of enactment of this Act, the Commission shall promulgate a final rule that— (1) establishes transmission planning processes and cost-allocation processes that— (A) ensure that transmission providers— (i) engage in interregional transmission planning processes and interconnection-wide transmission planning processes, in conjunction with transmission planning processes within transmission planning regions