Because they are type 4 SVC routines, nonstandard label processing routines must be included in the control program as part of LPALIB. This is done when the system is built. (You can also insert the routines after system build by link-editing them into LPALIB). See Adding a New Exit.

Member names for the first load module of each type of label processing routine are listed in Table 1. Member names for additional load modules must begin with the letters NSL or IGC.