See list attachedJUL 18 196868-PA-T-159APA/Chief, Apollo Data Priority CoordinationNo 15 minute constraint for Lunar Ascent Guidance
The Luminary GSOP indicated that it is necessary for the astronaut to call up the Ascent Guidance Program (P22) at least 15 minutes prior to lift off. This, of course, is not consistent with our desire to be able to use P12 if we get a No Go for lunar stay approximately 10 minutes after landing. In that case, we intend to call up P12 with less than seven minutes to go before lift off. By checking with MIT, we have verified that the 15 minute limit is not a real constraint and that the only limit is the time required for the crew to go through the operations associated with P12, which is currently estimated to be less than five minutes. (Simulations will eventually refine this, probably to a smaller value.)
I have asked MIT to modify their GSOP (by PCN) to reflect this.