; and (ii) the product obtained by multiplying— (I) the cost of a comparable gasoline- or diesel-fueled vehicle; and (II) 0.5; and (B) $500,000. (e) Amount of grant The amount of a grant provided by the Secretary under the program shall be not more than $20,000,000. (f) Cost sharing The non-Federal share of the cost of a project carried out using a grant under the program shall be not less than 20 percent. (g) Leak detection Each eligible entity that receives a grant under the program shall conduct— (1) a hydrogen leakage monitoring, reporting, and verification (also known as MRV ) program; and (2) a hydrogen leak detection and repair (also known as LDAR ) program. (h) Reporting (1) In general An eligible entity that receives a grant under the program shall submit to the Secretary such operational data relating to eligible costs described in subsection (d)(2) as the Secretary, in consultation with the Secretary of Energy, may require to accelerate market deployment of heavy-duty fuel cell vehicles that use hydrogen as a fuel source. (2) Requirement The operational data required by the Secretary under paragraph (1) shall include, at a minimum, data relating to— (A) operational expenses; (B) fuel use; and (C) reliability. (3) System The Secretary, in consultation with the Secretary of Energy, shall develop a system for data reporting and data sharing that allows similar fleet and fueling station operators to evaluate the performance of the program. (i) Authorization of appropriations There is authorized to be appropriated to the Secretary to carry out the program $200,000,000 for fiscal years 2024 through 2028.