If a user has ALLOCATE access to the alias name in the dataset rules, then they can delete the alias.
If a site has rules for all TSO users with a rule line of:
- UID(-) R(A) W(A) W(A) E(A).
This will allow anyone to delete the alias. To allow the users to create/delete datasets under the high-level qualifier, but prevent the alias from being deleted, change the generic rule line to:
*-.- UID(-) R(A) W(A) W(A) E(A).
This will mean that there has to be something besides the high-level qualifier, or a second level, before it would be allowed.