Quote:
Sec. 502.409.WRONG, FICTITIOUS, ALTERED, OR OBSCURED LICENSE PLATE.
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(a)A person commits an offense if the person attaches to or displays on a motor vehicle a number plate or registration insignia that:
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(5) has blurring [could be a thin layer of dirt] or reflective matter that significantly impairs the readability of the name of the state in which the vehicle is registered or the letters or numbers of the license plate number at any time;
(6) has an attached illuminated device or sticker, decal, emblem, or other insignia that is not authorized by law and that interferes with the readability of the letters or numbers of the license plate number or the name of the state in which the vehicle is registered; or
(7) has a coating [again, could be a thin layer of dirt], covering, protective material, or other apparatus that:
(A) distorts angular visibility or detectability;
(B) alters or obscures one-half or more of the name of the state in which the vehicle is registered; or
(C) alters or obscures the letters or numbers of the license plate number or the color of the plate.
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