Not later than 3 years after March 12, 2019, in accordance with subsections (b) and (c), the Secretary shall develop a comprehensive plan for the long-term management of the Scenic Area.

In accordance with this subchapter, the management plan shall include provisions for maintenance of existing public utility and other rights-of-way within the Scenic Area.

In developing the management plan, in accordance with this section, the Secretary may allow casual use mining limited to the use of hand tools, metal detectors, hand-fed dry washers, vacuum cleaners, gold pans, small sluices, and similar items.

Pending completion of the management plan, the Secretary shall manage the Scenic Area in accordance with section 460ffff–1(b) of this title.