(a)

(1) Any Class I railroad subject to the provisions of this subpart shall supply to the Administrator, upon request, in-use locomotives, selected by the Administrator. The number of locomotives which the Administrator requests under this paragraph (a)(1) shall not exceed five locomotives per railroad per calendar year. These locomotives or engines shall be supplied for testing at such reasonable time and place and for such reasonable periods as the Administrator may require. The Administrator shall make reasonable allowances to the railroad to schedule the supply of locomotives for testing in such a manner that it minimizes disruption of its operational schedule.

(2) Any non-Class I railroad or other entity subject to the provisions of this subpart shall supply to the Administrator, upon request, in-use locomotives, selected by the Administrator. The number of locomotives which the Administrator requests under this paragraph (a)(2) shall not exceed two locomotives per railroad (or other entity) per calendar year. These locomotives or engines shall be supplied for testing at such reasonable time and place and for such reasonable periods as the Administrator may require. The Administrator shall make reasonable allowances to the railroad or other entity to schedule the supply of locomotives for testing in such a manner that it minimizes disruption of its operational schedule. The Administrator shall request locomotives under this paragraph (a)(2) only for purposes which cannot be accomplished using locomotives supplied under paragraph (a)(1) of this section.

(b) Any railroad or other entity subject to the provisions of this subpart shall make reasonable efforts to supply manufacturers and remanufacturers of locomotives and locomotive engines with the test locomotives and locomotive engines needed to fulfill the in-use testing requirements contained in subpart G of this part.