218A may not perform labor or services pursuant to this section until the worker has returned to their home country, been readmitted as an H–2C worker pursuant to section 218A and has completed the period of employment specified in the job offer the worker accepted pursuant to section 218A or the employer has terminated the worker’s employment pursuant to section 218A(k)(3)(D)(i). (b) Period of stay H–2C workers performing at-will labor or services for a registered agricultural employer are subject to the period of admission, limitation of stay in status, and requirement to remain outside the United States contained in subsections (o) and (n) of section 218A, except that subsection (n)(3)(A) does not apply. (c) Registered agricultural employers The Secretary of Agriculture shall establish a process to accept and adjudicate applications by employers to be designated as registered agricultural employers. The Secretary shall require, as a condition of approving the application, the payment of a fee to recover the reasonable cost of processing the application. The Secretary shall designate an employer as a registered agricultural employer if the Secretary determines that the employer— (1) employs (or plans to employ) individuals who perform agricultural labor or services