Yeah, but he remained commissioner right up until the end of 1995, either before or after ultimate ultimate 1, i do remember reading they did try to convince him to try it out, then after he left, Don Wilson filled the void, but no one wanted a piece of tank, which was part of the reason he was so hostile to Wilson on some of the broadcasts, hence "dragonfly", granted, tank hated everyone, stomped out pat smith in an elevator, tried to crack allen goes at ufc 8, kind of an ass, really.
According to RVC himself he hired Tank http://www.sherdog.com/news/articles/Ron-Van-Clief-Where-Is-He-Now-18699
I'm pretty sure everyone short of Rorion Gracie has taken credit for finding tank at some point though.
From what i understood, he had a friend put in the application, and he decided to give it a go based on that, he'd supposedly already had a few backroom fights before that, but who knows, granted, it was better than Kimo and Joe Son showing up to one of the producers houses' shirtless in a sports car with bibles in their hands.