Item 614 specifies the electrical and mechanical working parts of a high mast lighting assembly. This includes the luminaires, wire rope, rings and supports, obstruction lighting, hoisting assemblies, power drive assemblies, and all other electrical equipment.

The ring and support assemblies must be fabricated at a plant listed on the MPL for High Mast Ring and Support Assembly Fabrication Plants. Luminaires are specified by DMS-11020 or Special Specification 6156. Rings, mechanical, and other electrical parts are specified by DMS-11021 and the HMID standard sheets.