Requirements

Authorization:: *State and key of the user calling the security function
Dispatchable unit mode:: Task of user calling security function
Cross memory mode:: PASN = HASN or PASN not = HASN
AMODE:: Any or 31 or 64 for IRRSXT0X
RMODE:: Any or 24
ASC mode:: AR mode
Serialization:: Enabled for interrupts
Locks:: No locks held
Control parameters:: The parameter list and the work area are in the primary address space. ALETs are passed for all parameters except the work area. The words containing the ALETs are in the primary address space.

Note: *Most callable services will be supervisor state and key 0. For services that can be invoked unauthorized, it can be problem state and any key.