RussM:
The way I understand the question of this thread is "are emergency light units REQUIRED in restrooms, and if so, what is the "Code Reference".
IMHO, the NEC does not specify the locations of exit and emergency lighting units, only the wiring and circuitry procedures for the units. The "placement" of exit/em. lts is determined by the Fire Official. (or the architect/engineer; subject to approvals during plan review by the Fire Official.
In this area, some localities require em ltg in rest rooms, some do not. We have em ltg in small retail restrooms, but not in large office buildings...
John
