Well I'm not eating my mortarboard yet. Rules are normally instructions or injunctions in the form of a sentence. (Unlike, say, booktitles, which may or may not be sentences.)
A simple two word sentence will consist of a noun and a verb.
To complain that the word following a noun is not a noun is obscurantism, plain and simple.
You are all parsing the rule at a very superficial level, rather than a deep level like wot I am.
I hope you don't write compilers!