I found an interesting letter to the family of Elder Taylor T. Gull that explains how the new simplified curriculum is being adopted in the San Bernadino Mission and about its future implementation:
We (President and I) have been involved in training the zone and district leaders in the new Simplified curriculum for the past few months. They, the zone leaders and district leaders will be involved in teaching the same program to all other missionaries in their areas. We, along with members of the mission presidency and other senior missionaries will be attending those various meetings for the next few months.
