47 C.F.R. § 27.1418

(a) Each eligible space station operator is responsible for the payment of its own satellite transition costs until the auction winners have been announced.

(b) Pursuant to the cost sharing formulas in § 27.1420, licensees in the 3980-4140 GHz portion of the 3.7 GHz Service shall pay their pro rata share of:

(1) The reasonable costs of the Upper C-band Clearinghouse and, in the event the Wireless Telecommunications Bureau selects the Relocation Coordinator, the services of the Relocation Coordinator and its staff;

(2) The actual relocation costs, provided that they are not unreasonable, for eligible space station operators; and the actual transition costs, provided they are not unreasonable, associated with the necessary migration of incumbent earth stations;

(3) Any lump sum payments, if elected by incumbent earth station operators in lieu of actual relocation costs;

(4) Any adjacent band radio altimeter retrofit rebates for Eligible Aircraft to Eligible Aircraft Owners or Operators; and

(5) Specified incentive payments for space station operators that clear by the Transition Deadlines in § 27.1412(a).

(c) If a license in the 3980-4140 MHz portion of the 3.7 GHz Service is relinquished to the Commission prior to all relocation cost reimbursements, lump sums, rebate claims, and incentive payments being paid, the remaining payments will be distributed among other similarly situated licensees in 3980-4140 MHz portion of the 3.7 GHz Service. If a new license is issued for the previously relinquished rights prior to final payments becoming due, the new licensee in the 3980-4140 MHz portion of 3.7 GHz Service will be responsible for the same pro rata share of relocation costs, lump sums, rebate claims, and incentive payments as the initial licensee in the 3980-4140 MHz portion of 3.7 GHz Service. If a licensee in the 3980-4140 MHz portion of 3.7 GHz Service sells its rights on the secondary market, the new licensee in the 3980-4140 MHz portion of 3.7 GHz Service will be obligated to fulfill all payment obligations associated with the license.