29 C.F.R. § 2570.47

(a) In its discretion, the Department may schedule a hearing on its own motion where it determines that issues relevant to the exemption can be most fully or expeditiously explored at a hearing.

(b) An applicant for an exemption must notify interested persons of any hearing on an exemption scheduled by the Department in the manner described in § 2570.46(c). In addition, the applicant must submit a statement subscribed as true under penalty of perjury like that required in § 2570.46(d).