§ 564. Agricultural labor crew leaders. 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. 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 crop dusting machinery or any other mechanized equipment which is provided by the crew leader, and

2. Exclusion from coverage. For purposes of this section the term "employment" shall not include services rendered by an individual who is admitted to the United States to perform agricultural labor pursuant to 8 USC 1188 if, at the time such services are rendered, they are excluded from the definition of employment in section 3306(c) of the Federal Unemployment Tax Act.

3. 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.