If the entire 16ft long opening is operable, then no receptacles are required. Conversely, if there are fixed panels at least 2 ft in width, those count as wall space that requires a receptacle.
The relevant text from 2017 NEC 210.52(A)(2):
(2) Wall Space. As used in this section, a wall space shall include the following:
(1) Any space 600 mm (2 ft) or more in width (including space measured around corners) and unbroken along the floor line by doorways and similar openings, fireplaces, and fixed cabinets that do not have countertops or similar work surfaces
(2) The space occupied by fixed panels in walls, excluding sliding panels
(3) The space afforded by fixed room dividers, such as freestanding bar-type counters or railings
Cheers, Wayne