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29 CFR §1206.4

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except in unusual or extraordinary circumstances, the National Mediation Board will not accept an application for investigation of a representation dispute among employees of a carrier:
  1. (a)For a period of two (2) years from the date of a certification or decertification covering the same craft or class of employees on the same carrier, and
  2. (b)For a period of one (1) year from the date on which:
    1. (1)The Board dismissed a docketed application after having conducted an election among the same craft or class of employees on the same carrier and less than a majority of valid ballots cast were for representation; or
    2. (2)The Board dismissed a docketed application covering the same craft or class of employees on the same carrier because no dispute existed as defined in § 1206.2 of these rules; or
    3. (3)The Board dismissed a docketed application after the applicant withdrew an application covering the same craft or class of employees on the same carrier after the application was docketed by the Board.