David A. was on the committee in the 1980's that recommended and got approved, the inclusion of the 12 Concepts of AA into the bylaws of the General Service Board making them legally binding and almost unchangeable.
Here he gives the most authoritative talk I know on the 12 Concepts of General Service.
David also did a two part talk on the Traditions that is excellent.
(1 hr 22 min) (37.7 MB) (id#1493)