I remember when NY/NJ came out with law preventing employers asking your previous wages (they used to ask for W2!!!). People were saying, oh, employers just won't hire in NY/NJ anymore! Guess what, job market is still hot as the sun and salary range went up across all my job searches and I don't have to deal with bullshit recruiters trying to play with comps.
Are the labor markets in New York and New Jersey substantially similar to the labor markets in Colorado? (And should we expect the specific regulations in NY/NJ (forbidding certain questions) and those in Colorado (requiring disclosure of information, and, requiring certain notifications of existing employees) to have the same effect?)
Every jurisdiction has laws and compliance regulations specific to that jurisdiction. These requirements seem in no way onerous or out of line to me.
I think the companies that will avoid CO applicants for jobs will be doing so because they want to avoid the wage transparency more than they want to avoid the regulatory burden.