“Hta 75(1) Enforcement”

Agree and disagree.

With respect to tint, the officer saying "I could not see inside the vehicle" is not really a subjective opinion, but an observable fact. As for being "too loud," decibels are measurable and it also would provide auto shops with a metric that they'd have to go by if someone came in and said "my muffler is too loud." However, I don't dispute that the example you came up is also an observable fact - it is actually based on observations as opposed to a subjective opinion.