5 CFR §210.101

1. (a)General. In most parts, the applicability of the part is stated specifically in the part or is otherwise apparent from the substance of the part.
2. (b)Parts 315 through 339. Parts 315 through 339 of this chapter apply to all positions in the competitive service and to all incumbents of those positions; and, except as specified by or in an individual part, these parts do not apply to positions in the excepted service or to incumbents of those positions.