With z/OS® V1R7, you can remove the definition of an unneeded EMCS console by using the sample program IEARELEC, which is shipped in SYS1.SAMPLIB. See z/OS MVS Planning: Operations for a description of this program and how to it. Removing these console definitions allows you to reuse the console ID assigned to the EMCS console, although IBM® continues to recommend using a console name rather than a console ID for console communications.
An EMCS console can be deactivated on a downlevel system, but can only be removed on a z/OS V1R7 system after it has been deactivated. Once removed, the console ID can be reused by activating an EMCS console on a V1R7 system.