Joey, every two years, here in MD, you have to take your car through vehicle emissions that tests your car for leaking fluids, excessive smoke, signs of tampering with the exhaust system, etc. for a fee of &#036;14.00.  If you pass, you get a certificate good for two years, if you donâ€™t pass you have to get the problems corrected and retry.  If your car is 25 years or older, you are exempted from going through the emissions testing, but your car must have a historic tag, that certifies that your car is as old as you say it is.