A library is really a special type of object. You set authority for a library just like you set authority for any other object, by using the EDTOBJAUT command. All libraries reside in the IBM-supplied library that is called QSYS.
Use the Edit Object Authority (EDTOBJAUT) command to set specific authority for the library and objects in the library, based on the information on your Library description worksheet.
The public authority for new objects (CRTAUT) authority does not appear on the Edit Object Authority display for a library. Use the Display Library (DSPLIB) command to see the CRTAUT for a library. You can also use this procedure to set up specific authority to an object on the system. You can now set specific authority for an object.