NACHI TV - VS - NACHI Text Course

I was watching the video today on mold testing and noticed what I believe to be a contradiction.

In the video Ben says that when performing a limited mold inspection (crawlspace) he would take air samples etc. in the crawlspace.

The text based course however states the following: Location
• An indoor air sampling should take place only in a livable space in the building. Sampling in
areas such as closets, under-floor crawlspaces, unfinished attics, storage or utility rooms,
or inside the HVAC system is prohibited.

I’m confused by this. Are air samples prohibited in the crawlspace or not?