5 C.F.R. § 2424.21 Time limits for filing a petition for review.
Title 5 - Administrative Personnel
(a) A petition for review must be filed within fifteen (15) days after the date of service of either: (1) An agency's written allegation that the exclusive representative's proposal is not within the duty to bargain, or (2) An agency head's disapproval of a provision. (b) If the agency has not served a written allegation on the exclusive representative within ten (10) days after the agency's principal bargaining representative has received a written request for such allegation, as provided in §2424.11(a), then the petition may be filed at any time.
Title 5: Administrative Personnel
PART 2424—NEGOTIABILITY PROCEEDINGS
Subpart C—Filing and Responding to a Petition for Review; Conferences
§ 2424.21 Time limits for filing a petition for review.