yes but don’t you see the contradiction? Plus the wording in my opinion is off. Re identifying of a neutral wire when in fact it’s a re I’d of a color wire to become a neutral wire
You can identify a conductor with about anything you want. Numbers is pretty common.
Grounded and grounding conductors are pretty much restricted to white/gray or green/green with yellow stripe, or bare conductor.
Cable assemblies is about only place you can re-identify a white or gray as an ungrounded conductor in certain situations though.
Grounded/grounding conductors must be the correct color for the application the entire length of the conductor unless 4 AWG and larger then they can be marked at/near ends of the conductor. (a pull box or conduit body with no splices or terminations inside has no "ends" within it and conductors would not need marked in those places)