PMDA engine 1511.6 (aka “PMDA rules version 1.0”) is being phased out at PMDA. This legacy engine was valid for initial submission dates of 2016-10-01 to 2021-03-31 and was maintained as backup only for past submissions already under PMDA review. End of support is planned for 2023-03-27. After this date, PMDA 1511.6 will no longer be available in the Engine drop down.