Comment Read section (I) of the law for the whole story (Score 5, Informative) 670
(I) This section does not apply to a box, safe, container, or other item added to a vehicle for the purpose of securing valuables, electronics, or firearms provided that at the time of discovery the box, safe, container, or other item added to the vehicle does not contain a controlled substance or visible residue of a controlled substance.
So it's OK to have a hidden compartment in your car as long as it does not contain a controlled substance or visible residue of a controlled substance. For the record, I still think the law is crap but it's not as bad as the article makes it out to be.