No person permitted to enter upon a public wharf, public mooring facility, public cargo facility or public storage area or facility at any Port Authority marine terminal, shall, while upon such area, hire any other person, there present, to perform loading or unloading of vehicles (other than railroad cars) unless such other person shall be a person authorized by law to perform such work at such place as an independent contractor.
N.Y. Comp. Codes R. & Regs. Tit. 21 § 1241.3