1. Coverage. (a) Notwithstanding the provisions of section five hundred sixty of this article, an employer of persons engaged in agricultural labor shall become liable for contributions under this article if the employer:

1. (1) has paid cash remuneration of twenty thousand dollars or more in any calendar quarter to persons employed in agricultural labor, and such liability shall commence on the first day of such quarter, or
2. (2) has employed in agricultural labor ten or more persons on each of twenty days during a calendar year or the preceding calendar year, each day being in a different calendar week, and the liability shall in such event commence on the first day of the calendar year, or
3. (3) is liable for the tax imposed under the federal unemployment tax act as an employer of agricultural labor and the liability shall in such event commence on the first day of the calendar quarter in such calendar year when he first paid remuneration for agricultural labor in this state.

4. (b) An employer who becomes liable for contributions under paragraph (a) of this subdivision shall cease to be liable as of the first day of a calendar quarter next following the filing of a written application provided the commissioner finds that the employer:

   1. (1) has not paid to persons employed in agricultural labor cash remuneration of twenty thousand dollars or more in any of the eight calendar quarters preceding such day, and
   2. (2) has not employed in agricultural labor ten or more persons on each of twenty days during the current or the preceding calendar year, each day being in a different week, and
   3. (3) is not liable for the tax imposed under the federal unemployment tax act as an employer of agricultural labor.

2. Crew leader. Whenever a person renders services as a member of a crew which is paid and furnished by the crew leader to perform services in agricultural labor for another employer, such other employer shall, for the purpose of this article, be deemed to be the employer of such person, unless:

1. (a) the crew leader holds a valid certificate of registration under the federal farm labor contractor registration act of nineteen hundred sixty-three or substantially all the members of the crew operate or maintain tractors, mechanized harvesting or cropdusting machinery or any other mechanized equipment which is provided by the crew leader, and
2. (b) the crew leader is not an employee of such other employer and has not entered into a written agreement with such employer under which he is designated as an employee.