https://www.ibm.com/docs/en/ims/15.6.0?topic=environment-making-ims-imsrdr-procedures-accessible-zos
IMS 15.6 - System definition - Making IMS and IMSRDR procedures accessible to z/OS
The IMS and IMSRDR procedures initiate the IMS control program region and message regions. Users can copy the sample procedures to IMS.PROCLIB from...