; and (2) promote the long-term protection and management of the watershed and underground karst system of the Recreation Area. (g) Motorized vehicles (1) In general Except as needed for emergency response or administrative purposes, the use of motorized vehicles in the Recreation Area shall be permitted only on roads and motorized routes designated in the Management Plan for the use of motorized vehicles. (2) New roads No new permanent or temporary roads or other motorized vehicle routes shall be constructed within the Recreation Area after the date of enactment of this Act. (3) Existing roads (A) In general Necessary maintenance or repairs to existing roads designated in the Management Plan for the use of motorized vehicles, including necessary repairs to keep existing roads free of debris or other safety hazards, shall be permitted after the date of enactment of this Act, consistent with the requirements of this section. (B) Rerouting Nothing in this subsection prevents the Secretary from rerouting an existing road or trail to protect Recreation Area resources from degradation, or to protect public safety, as determined to be appropriate by the Secretary. (4) Over snow vehicles Where allowed prior to the date of enactment of this Act, the Secretary shall authorize the use of snowmobiles and other over snow vehicles within the Recreation Area if there is at least 6 inches of snow coverage, subject to such terms and conditions as the Secretary determines to be necessary. (5) Applicable law Activities authorized under this subsection shall be consistent with the applicable forest plan and travel management plan for, and any law (including regulations) applicable to, the Ashley National Forest. (h) Water infrastructure (1) Existing access The designation of the Recreation Area shall not affect the ability of authorized users to access, operate, and maintain water infrastructure facilities within the Recreation Area in accordance with applicable authorizations and permits. (2) Cooperative agreements (A) In general