A. Light or heavy equipment storage yards accessory to a storage, repair or maintenance building on the same property or on adjacent property under the same ownership.

B. Uses and structures customarily accessory and clearly incidental to permitted principal uses and structures.

C. Dwellings for caretaker, guard or other persons whose permanent residency on the premises is required for operational safety, or protective purposes, or for persons engaged in certain industrial operations whose residency in the vicinity satisfies conditions or requirements of the work.

D. The following uses may be permitted by obtaining a conditional use permit, and must be enclosed on all sides by a site-obscuring fence not less than six feet in height if the use is located on a lot which abuts an arterial or higher classification road as recognized by the city of Palmer, or the lot abuts or is immediately across a recognized public right-of-way or easement from any lot not zoned industrial: