Commercial Inspections

Can you direct me to a site?

Call the Colorado DMV and ask them.

for the car produced after 1982, the fee is $ 25 payable by cash or check.

Vehicles manufactured in 1981 and before and powered by gasoline demand a test of two idle. This test is offered by health centers of the air in Colorado, and many facilities accredited independent inspection. The fee is $ 15 and the test is valid for one year.
I dont know about your condition, but in New York for a limousine sticker through the same inspection as other cars, you get a sticker on your VIN as a normal car. (They just plug a computer to your limousine to check if you have any "check engine" or signs of brake problems, just like everyone else), he worked as a livery vehicle, but if you want to make a plate limousine bus Hummer H2 SUV, Escalade (you could also make regular limousine as: designate up to 14 passengers), so you have to go through inspection with the Department of Motor Vehicles to make sure you have all the security features (such as emergency exit, all the necessary knowledge, sit belts, etc.), after getting the bus plate / registration, you will go through the same routine inspection as a Hummer or Escalade.