29 CFR 500.216: Substituted service.

(a) Pursuant to section 102(5) of the Act, the Secretary, when so designated by a court, shall accept service of summons in any action arising under the Act or these regulations against any applicant for or any holder of a Certificate of Registration who has left the jurisdiction in which such action is commenced or otherwise has become unavailable to accept such service.

(b) Acceptance of service of summons referred to in paragraph (a) of this section shall be under such terms and conditions as are set by the court in its designation of the Secretary for the purpose of section 102(5) of the Act.

(c) To be effective, such service shall be made by delivery personally or by certified mail, either to the Administrator of the Wage and Hour Division in Washington, DC, or to the Administrator's authorized representative located in the area in which the action has been commenced.