; (B) the multiple start dates share a common end date; (C) no more than 120 days separate the first start date and the final start date listed in the petition; and (D) the need for multiple start dates arises from variations in labor needs associated with the job opportunity identified in the petition. (4) Post-certification amendments The Secretary of Labor shall provide a process for amending a request for labor certification in conjunction with an H–2A petition, subsequent to certification by the Secretary of Labor, in cases in which the requested amendment does not materially change the petition (including the job order). (n) Special procedures (1) In general The Secretary of Labor, in consultation with the Secretary of Agriculture and the Secretary of Homeland Security, may by regulation establish alternate procedures that reasonably modify program requirements under this section, including for special procedures industries, when the Secretary determines that such modifications are required due to the unique nature of the work involved. (2) Allergy limitation An employer engaged in the commercial beekeeping or pollination services industry may require that an applicant be free from bee pollen, venom, or other bee-related allergies. (3) Special procedures industries (A) Application An individual employer in a special procedures industry may file a program petition on its own behalf or in conjunction with an association of employers. The employer’s petition may be part of several related petitions submitted simultaneously that constitute a master petition. (B) Special procedures industry defined In this subsection, the term special procedures industry means— (i) sheepherding and goat herding; (ii) itinerant commercial beekeeping and pollination; (iii) open range production of livestock; (iv) itinerant animal shearing; and (v) custom combining industries.