The following shall be subject to a limited exception to the prohibition against entry or occupancy in the restricted zone.

(1) U.S. Geological Survey personnel who are performing official duties related to scientific evaluation and hazard assessments that require their presence in the restricted zone.

(2) U.S. Forest Service personnel who are performing official duties that require entry into the restricted zone.

(3) U.S. Army Corps of Engineers personnel who are performing official duties that require their presence in the restricted zone.

(4) Search and rescue personnel registered or identified pursuant to RCW 38.52.010(5) on official search and rescue missions within the restricted zone. The sheriffs of counties whose jurisdictions lie within the boundaries of the restricted zone or their designee(s) shall have the authority to approve entry and/or occupation by search and rescue personnel.

(5) Federal, state, county and local law enforcement and firefighting personnel whose jurisdiction is within the restricted zone and who are on official business within the restricted zone.

(6) Federal, state, county or local administrative personnel on official business within the restricted zone.

(7) Individual(s) who own and/or control real property, or personal property being used as a residence, and whose official permanent residence is within the restricted zone when applicable.

(8) Individual(s) with a legitimate business reason for being within the restricted zone as determined by the director, department of emergency management, or his designee(s).