Minimum Space for Insulation in Attic

I was hoping someone could help me with this one. I’m stumped. I came across this question and I can not fin the answer anywhere. “There should be a minimum space of _____ provided between the insulation and the roof-deck sheathing.” 1/8, 1 inch., 1 1/2 inch or 2 inches. I went through they exterior course and the roof inspection course. I even did a search online and I found nothing. Does anyone know the answer to this question?

Thanks !!

“There should be a minimum space of 1 inch provided between the insulation
and the roof deck sheathing and at the location of the vent.”

I found it here…

Thank you Roy Lewis !! I spent the better part of an hour trying find that information.

No problem.
Have a great day.