This document provides information on different types of work authorizations and contracts for foreign workers in the United States. It discusses hired, fulltime, and C2C contracts, and the legal work statuses of GC, H1, H4, L1, EAD, and citizens. It then provides more details on the green card filling procedure, requirements for H1 and L1 visas, and rights of green card holders and H4 EAD holders.