/sys$common/syshlp/helplib.hlb SCA, LOAD, Qualifiers, /LIBRARY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LIBRARY=library-spec
       /LIBRARY=primary-library (D)

    Specifies an SCA physical library to update. This library must
    be one of the current SCA libraries, established by a SET LIBRARY
    command.

    If you do not specify this qualifier, SCA refers to the primary
    SCA library; that is, SCA updates the first of the current SCA
    physical libraries.