>> Does this mean a Space Switching PC cannot be used to remove the 
>> users access ?
>
>  That is correct.

Perhaps with the exception of the (somewhat atypical but allowed) PC-SS 
that is defined not to set new-SASN to old-PASN (ETDEF with SASN=NEW).
Of course if using that approach you cannot use ALET=1 to access 
caller-provided data that was in the caller's primary address space.

Peter Relson
z/OS Core Technology Design

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