Thank you for that information.
Now, the law does indeed provide for an exemption for individuals who have a medical condition. The exact statute is Section 22-406 of the Transportation Code. I have attached a link to that section here: http://law.justia.com/codes/maryland/2010/transportation/title-22/subtitle-4/22-406/
Sub-paragraphs (i)(4)(i) states that: "A person who must be protected from the sun for medical reasons is exempt from the provisions of paragraph (1) of this subsection if the owner has, in the vehicle at the time the vehicle is stopped by a police officer, a written certification that details the owner's medical need for tinted windows, from a physic***** *****censed to practice medicine in the State."
As you can see, the law allows one to avoid a ticket for illegal tints if they provide the letter to the officer at the time of the stop.
That being said, one in your situation may still raise this issue in order to avoid paying the ticket by showing the letter (as long as it is dated as well) to a judge or prosecutor, who may be willing to dismiss the ticket based upon the letter.
Regarding what the State Police said, I am not too sure as to why it said it does not matter. Perhaps they meant to say it was too late to show the letter to avoid getting the ticket (which would be correct under the law). However, one may still be able to avoid paying the ticket by showing the prosecutor or the Court the letter.
As to whether or not the tints can be forcibly removed, based upon the language of the law, it appears that the answer is no as to do so would render the law that provides exemptions to individuals with medical conditions useless.
I hope this has helped. Please let me know if you have any follow up questions based on what I have provided. If so, I would be more than happy to answer them and provide further clarification.
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