I would say yes they do, as 100.3(B) in the NEC states that listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. I'm positive that the manufacturer of the exit signs has testing instructions and testing requirements for the equipment.
Look at it this way, an NFPA 110, Level 1 system (NEC 700) is allowed up to 10 seconds to transfer the required emergency loads to the emergency source and restore power. The unit equipment within the exit sign will function as the emergency source of power for the exit sign from the loss of the normal source of power to the transfer to the emergency source of power. The exit signs will always be energized
An additional thought to take into consideration, if there are any emergency luminaires that provide emergency lighting for the exterior of the exit doors, be sure that these emergency luminaires are not supplied with emergency power by the exit sign unit equipment.
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