So one of you may not be able to find the rules and the other may not remember to. Oh well, at least you both have good intentions.
I did remember to fetch the rules. Here you go....
For the BCA rule book...
1965 -- no rules for 9B ...
1968 -- one page of rules. Primary way was that you had to shoot to hit. I've seen money matches like this. An optional "shoot out" rule is present but it is really badly written and incomplete.
1967, 1970, 1971, 1974, 1977, 1978, all the same as 1968.
1980 -- major revision that pretty much makes sense:
I don't think I ever saw the "three for loss of game" in action but I suppose it is required for when the ball can't be hit.
1982 -- small modification -- if the lowest ball is in the kitchen with a kitchen BIH, it is spotted rather than put down.
1985 -- major revision to be mostly like current rules. Nothing spots and all fouls are ball-in-hand anywhere. Also, the game is call shot. If you call safe your opponent can have you shoot again, but if you just happen to "miss" your called ball, he has to shoot. That is to say, they made "safes" totally goofy.
1986 -- the call shot rule was repaired.
1988 -- no change
1990 -- the call shot game and the professional rules game are both included. The "pro" rules were copied from the PBA (men's pro tour) without any acknowledgement of previous copyright.