(a) Increases in number of workers. The employer may request to increase the number of workers noted in the H-2B Registration by no more than 20 percent (50 percent for employers requesting fewer than 10 workers). All requests for increasing the number of workers must be made in writing and will not be effective until approved by the CO. In considering whether to approve the request, the CO will determine whether the proposed amendment(s) are sufficiently justified and must take into account the effect of the changes on the underlying labor market test for the job opportunity. Upon acceptance of an amendment, the CO will submit to the SWA any necessary changes to the job order and update the electronic job registry. The employer must promptly provide copies of any approved amendments to all U.S. workers hired under the original job order.

(b) Minor changes to the period of employment. The employer may request minor changes to the total period of employment listed on its Application for Temporary Employment Certification and job order, for a period of up to 14 days, but the period of employment may not exceed a total of 9 months, except in the event of a one-time occurrence. All requests for minor changes to the total period of employment must be made in writing and will not be effective until approved by the CO. In considering whether to approve the request, the CO will determine whether the proposed amendment(s) are sufficiently justified and must take into account the effect of the changes on the underlying labor market test for the job opportunity. Upon acceptance of an amendment, the CO will submit to the SWA any necessary changes to the job order and update the electronic job registry. The employer must promptly provide copies of any approved amendments to all U.S. workers hired under the original job order

(c) Other amendments to the Application for Temporary Employment Certification and job order. The employer may request other amendments to the Application for Temporary Employment Certification and job order. All such requests must be made in writing and will not be effective until approved by the CO. In considering whether to approve the request, the CO will determine whether the proposed amendment(s) are sufficiently justified and must take into account the effect of the changes on the underlying labor market test for the job opportunity. Upon acceptance of an amendment, the CO will submit to the SWA any necessary changes to the job order and update the electronic job registry.

(d) Amendments after certification are not permitted. The employer must promptly provide copies of any approved amendments to all U.S. workers hired under the original job order.