The SSSR transaction is used to define all sign-ons to the system and can only be accessed by the Security Supervisor and Alternate Supervisors. Once the Security Supervisor is signed on, he may then use SSSR to set up the Alternate Supervisors. Once an Alternate (Level) Supervisor has had a security record set up by the Security Supervisor, the Level Supervisor can also use SSSR to set up other sign-ons.