willy k wrote:
If it's a noun on its own, no need to add the s. "State," "Conference," etc.
If it's not a noun, you add the -s to make it sound less awkward. "Nationals," "Regionals," etc. "National" and "Regional" are not nouns, so you can't use them as such.
/debate
This was the right answer and there was no need for any further posting.