Correct 410.10
(D) Bathtub and Shower Areas. No parts of cord-connected
luminaires, chain-, cable-, or cord-suspended luminaires, lighting
track, pendants, or ceiling-suspended (paddle) fans shall be
located within a zone measured 900 mm (3 ft) horizontally and
2.5 m (8 ft) vertically from the top of the bathtub rim or
shower stall threshold. This zone is all encompassing and
includes the space directly over the tub or shower stall. Luminaires
located within the actual outside dimension of the bathtub
or shower to a height of 2.5 m (8 ft) vertically from the top
of the bathtub rim or shower threshold shall be marked for
damp locations, or marked for wet locations where subject to
shower spray.
It does not give a min but it does say anything in there needs to be marked for damp or wet locations.