20 C.F.R. § 655.1293

(a) Systematic process. This subpart provides procedures for the processing of applications from agricultural employers and associations of employers for the certification of employment of nonimmigrant workers in agricultural employment.

(b) Establishment of special procedures. To provide for a limited degree of flexibility in carrying out the Secretary's responsibilities under the Immigration and Nationality Act (INA), while not deviating from statutory requirements, the Administrator, OFLC has the authority to establish or to devise, continue, revise, or revoke special procedures in the form of variances for processing certain H-2A applications when employers can demonstrate upon written application to the Administrator, OFLC that special procedures are necessary. These include special procedures in effect for the handling of applications for sheepherders in the Western States (and adaptation of such procedures to occupations in the range production of other livestock), and for custom combine crews. In a like manner, for work in occupations characterized by other than a reasonably regular workday or workweek, such as the range production of sheep or other livestock, the Administrator, OFLC has the authority to establish monthly, weekly, or bi-weekly adverse effect wage rates (AEWR) for those occupations for a statewide or other geographical area. Prior to making determinations under this section, the Administrator, OFLC will consult with employer and worker representatives.