by or is exempt from the State workers’ compensation law, a registered agricultural employer shall provide, at no cost to the worker, insurance covering injury and disease arising out of, and in the course of, the worker’s employment, which will provide benefits at least equal to those provided under the State workers’ compensation law. (2) Designated workers (A) In general Individuals who have been previously admitted to the United States in H–2A status, and maintained such status during the period of admission, shall be provided the opportunity to apply for portable H–2A status. Portable H–2A workers shall be subject to the provisions on visa validity and periods of authorized stay and admission for H–2A workers described in paragraphs (2) and (3) of section 218(j) of the Immigration and Nationality Act ( 8 U.S.C. 1188(j) (2) and (3)). (B) Limitations on availability of portable H–2A status (i) Initial offer of employment required No alien may be granted portable H–2A status without an initial valid offer of employment to perform temporary or agricultural labor or services from a registered agricultural employer. (ii) Numerical limitations The total number of aliens who may hold valid portable H–2A status at any one time may not exceed 10,000. Notwithstanding such limitation, the Secretary of Homeland Security may further limit the number of aliens with valid portable H–2A status if the Secretary determines that there are an insufficient number of registered agricultural employers or job opportunities to support the employment of all such portable H–2A workers. (C) Scope of employment During the period of admission, a portable H–2A worker may perform temporary or seasonal agricultural labor or services for any employer in the United States that is designated as a registered agricultural employer pursuant to paragraph (1). An employment arrangement under this section may be terminated by either the portable H–2A worker or the registered agricultural employer at any time. (D) Transfer to new employment At the