For ACF2 r16 with JES3, can modifications made via ACFUSX02 be activated without an IPL?

Document ID : KB000095690
Last Modified Date : 01/06/2018
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Question:
For ACF2 r16 with JES3, can modifications made via ACFUSX02 be activated without an IPL?  
Answer:
To activate any changes to ACF2/JES3 modules, after applying Usermod UMJ3999, a JES3 hot start is required.