Posted by c2cdiver on October 10, 2002 at 18:10:37:
In Reply to: research paper posted by Desi Torres on October 10, 2002 at 10:49:13:
I don't quite recall the specifics. But,it was manditory in the late 70's in LA County, maybe it was even farther reaching then that. I'd have to ask a few frienda with better memories. Recertification became mandatory and it was fought hard, much thanks to the GLACD. It only lasted a few years and then it was back to normal.
The certifying agencies should make the cards mean something. Many places in world look at log books instead of the meaningless piece of plastic.