redwood pages when will it be mandatory to use?

Hello,

when will the redwood pages be mandatory to use? in what Oracle hcm version ?

https://www.oracle.com/webfolder/technetwork/tutorials/tutorial/cloud/r13/wn/hcmcommon/releases/23D/23D-hcm-common-wn.htm#F29713

Thanks a lot

Revital