N.Y.C. Admin. Code § 28-404.3.3: § 28-404.3.3 Tower crane rigger license qualifications.

All applicants for a tower crane rigger license shall submit satisfactory proof establishing that the applicant:

1. Has, within the one (1) year prior to application, satisfactorily completed a department-approved training course for tower crane rigging that is at least 30 hours in length and in accordance with the requirements of section 3319.10.1 of the New York city building code; and

2. Has at least five (5) years of practical experience in the tower crane rigging business in the city of New York within the seven (7) years prior to application.