22 U.S. Code § 4115 - Unfair labor practices
Issues which can properly be raised under an appeals procedure may not be raised as unfair labor practices prohibited under this section. Except for matters wherein, under section 4139(a)(2) of this title, an employee has an option of using the grievance procedure under subchapter XI or an appeals procedure, issues which can be raised under section 4114 of this title or subchapter XI may, in the discretion of the aggrieved party, be raised either under such section or subchapter or else raised as an unfair labor practice under this section, but may not be raised both under this section and under section 4114 of this title or subchapter XI.
1991—Subsec. (d). Pub. L. 102–138 substituted “section 4139(a)(2)” for “section 4139(b)”.