Earlier quoted context omitted.
Some things, like not being able to set their own rates, meant drivers were never contractors, even if they wanted the perks of contracting (e.g, choose your own hours). Saying 'I wish to be a contractor' isn't legally sufficient: the agreement needs to permit setting rates.
Do contractors really set their own rates?
This is simply closing a loophole gig platforms were built on (misclassifying workers in violation of labor law).