Sec. 3.1. (a) Except as provided in subsection (b), a vehicle may be stopped to determine compliance with this chapter. However, a vehicle, the contents of a vehicle, the driver of a vehicle, or a passenger in a vehicle may not be inspected, searched, or detained solely because of a violation of this chapter.
(b) A law enforcement agency may not use a safety belt checkpoint to detect and issue a citation for a person's failure to comply with this chapter.