Here is a list of the parameters applicable to the USER control statement:
All other parameters and keywords that may be supplied on the USER statement are equivalent to those specified in PROFILE options and limits (excluding PASSTRY, SIGNON and SIGNONPANEL) and PROFILE session definitions.
Any of these options and definitions, when specified on the USER statement, override any corresponding ones specified on the associated PROFILE statement (or SYSTEM statement).
There may be some variation on this rule regarding session defaults and definitions. For details, refer to Configuration defaults and overrides.