29 C.F.R. § 551.4
A petition for a finding under section 13(b)(11) of the Act and this part shall include in such detail as the Administrator may deem necessary for evaluation under the standards provided by the statute and this part, all the information required by § 551.5 . Such information may be presented in any form convenient to the petitioner; no particular form is prescribed for the petition. The petition shall also include, by attachment, a copy of any collective bargaining agreement or other document governing the method of payment for the work of employees covered by the wage payment plan with respect to which a finding is requested. The petition, together with any such documents, shall be filed with the Administrator, Wage and Hour Division, United States Department of Labor, Washington, DC 20210.
29 C.F.R. §551.4