; (III) authorizing the use of motorized vehicles or mechanized transport to carry out activities described in subsection (d) or (e); or (IV) responding to an emergency. (D) Commercial timber (i) In general Subject to clause (ii), no project shall be carried out in the Wildlife Conservation Area for the purpose of harvesting commercial timber. (ii) Limitation Nothing in clause (i) prevents the Secretary from harvesting or selling a merchantable product that is a byproduct of an activity authorized under this section. (d) Fire, insects, and diseases The Secretary may carry out any activity, in accordance with applicable laws (including regulations), that the Secretary determines to be necessary to manage wildland fire and treat hazardous fuels, insects, and diseases in the Wildlife Conservation Area, subject to such terms and conditions as the Secretary determines to be appropriate. (e) Regional transportation projects Nothing in this section or section 110(f) precludes the Secretary from authorizing, in accordance with applicable laws (including regulations) and subject to valid existing rights, the use of the subsurface of the Wildlife Conservation Area to construct, realign, operate, or maintain regional transportation projects, including Interstate 70 and the Eisenhower-Johnson Tunnels. (f) Water Section 3(e) of the James Peak Wilderness and Protection Area Act ( Public Law 107–216