garage under bedroom

Owner built a new garage with bedroom above in 2010, when was the ceiling separation rule from garage introduced ? I thing there should be sheetrock covering this ceiling, correct. ? Thanks

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Yes…
If you look at it as a potential safety hazard, you don’t need to state dates of, or comment on, when certain codes came into effect.

http://www.nachi.org/attached-garage-fire-hazards.htm

The ductwork is also an issue and more difficult to correct. Sheetrock in this case needs to be 5/8 in Type-X. The requirement existed prior to 2010, but that is not important.

Great replies and I enjoyed the link Larry.