; or (ii) by more than 55 percent cumulatively in the preceding 3-year period. (2) Costs to be considered In establishing a benefit-to-cost ratio under this section with respect to an air traffic control tower, the Secretary shall consider only the following costs: (A) The Federal Aviation Administration’s actual cost of wages and benefits of personnel working at the tower. (B) The Federal Aviation Administration’s actual telecommunications costs directly associated with the tower. (C) The Federal Aviation Administration’s costs of purchasing and installing any air traffic control equipment that would not have been purchased or installed except as a result of the operation of the tower. (D) The Federal Aviation Administration’s actual travel costs associated with maintaining air traffic control equipment that is owned by the Administration and would not be maintained except as a result of the operation of the tower. (E) Other actual costs of the Federal Aviation Administration directly associated with the tower that would not be incurred except as a result of the operation of the tower (excluding costs for noncontract tower-related personnel and equipment, even if the personnel or equipment is located in the contract tower building). (3) Other criteria to be considered In establishing a benefit-to-cost ratio under this section with respect to an air traffic control tower, the Secretary shall add a 10 percentage point margin of error to the benefit-to-cost ratio determination to acknowledge and account for the direct and indirect economic and other benefits that are not included in the criteria the Secretary used in calculating that ratio. (4) Review of cost-benefit determinations In issuing a benefit-to-cost ratio determination under this section with respect to an air traffic control tower located at an airport, the Secretary shall implement the following procedures: (A) The Secretary shall provide the airport (or the State or local government having jurisdiction over the airport) at least 90 days following the