Living space. Any part of the roof over heated area....Not the garage or over storage closets...and of course over the soffit is not living area.How are you defining "living space"?
Not mounting over living space is a nation-wide rule..... enforcement is a different issue altogether.
It may be a nationwide rule. I can tell you I have never heard of it. And no one here has ever failed a qc because of it.
Again if these restrictions were mandatory, completion rates would tumble to unacceptable numbers.