I'm shooting from the hip but I think that's where this whole thing got shot down by Congress. It was to be imposed by the DOT on pilots, truckers, etc, without going through the normal rulemaking process. Congress shot that down and Obama signed an HR that required the rulemaking process to be followed but it was oriented around truck driving. I am not certain of what has transpired for truckers but it's now evidently back for pilots.

As it pertains to pilots I believe AOPA led the charge against it. I would have to keyword search to see if ALPA said anything.

When it came to truckers they said at $2200 multiplied by the number of truckers that would have to be tested that the cost would be $1B. To some that's a cost. To others that's pure revenue.