After upgrading to z/OS 3.1 and applying OPS/MVS maintenance (Level 12 - including PTF LU19585), TOD rules enabled during initialization disable themselves immediately.
z/OS 3.1 , OPS/MVS 14
Any rules compiled before application of LU19585 might fail to execute
and must be recompiled. In particular, previously compiled Time-of-day
(TOD) rules cannot compute the next fire time once enabled and become
instantly disabled.
Apply PTF LU20470
Recompile all rules one time during startup after activating level 12.