@MajorGrom @mushymush
I don't know how the IRCC officers make the decision concerning the NOC, but chosing a NOC that you cannot back up with a reference letter stating at least some of the roles listed there is clearly a misrepresentation.
What is misrepresentation :
A misrepresentation is a false or misleading statement or a material omission which renders other statements misleading, with intent to deceive.
Since IRCC has clearly set the NOCs eligible to apply through Express Entry, chosing one you cannot match, is therefore not just a mistake.
Ontario has a whole nomination program that is based on NOC selection, so I would say they play a pretty important role in the application process.
I would advise to do a careful research when chosing the NOC, which you would have plenty of time after the ITA to consider it.