Photo identification (ID) is required to enter the SLAC main gate. Users must review access requirements and inform User Research Administration of their planned arrival in advance. LCLS and SSRL users must be listed on scheduled user facility experiments (on the access list). Users must complete training in order to obtain a SLAC ID badge and proximity access. International users must bring their passport and visa documents to present to SLAC Security for access. Users from certain countries also need to forward additional information (including their passport bio page) in advance to obtain approval before visiting SLAC. In addition to SLAC's main gate, users need a SLAC ID badge to enter through Security Gates 17 or at Sector 30.