An indispensable prerequisite to this nonimmigrant stat us is the preliminary procurement of the Attorney Gen- eral’s approval of a petition filed in accordance with the preceding subsection. Without such an approved petition the consul will not issue a nonimmigrant visa.
An alien admitted in the temporary worker classification is admitted for the period of established need, which may not exceed the validity of the petition or the expiration date of previously authorized extension of temporary stay. Extensions of stay may be allowed in increments not exceeding one year each, but the total of uninterrupted stay resulting from such extensions for the H-2 temporary worker category cannot exceed three years.