I'll grant you that, bearing in mind that tactics with the other boat subject to RRS 17 are out of court.

I would go as far as 'heart of proper course.'

I think 'N races are scheduled' means exactly N.

This is important to the scoring structure, and hence competitors regatta strategy for the event.

RRS 27 and 32 provide mechanisms and conditions for sailing less than that number.

Without amending the NOR/SI the RRS don't make any provision for increasing the number of scheduled races.

OK, it's possible to write NOR with an open ended number of races.  The Tasers used to do this.  Personally I think that's a device of the devil.  It means that race durations are going to go in and out at the whim of the RO.

There were a couple of interesting questions raised above.  
1) If you were to provide advice with AI what would you train it with.   
I would train it first with the rule book, then I would give it the World Sailing Casebook, then I would give it any national authority Appeal books available online (RYA, US Sailing, Sail Canada).  I would probably add written decisions from major regattas with experienced trusted juries (Olympics, Olympic Class World Championships).  If I were training it to write decisions I would give it the Standard Wording document.  I would consider what other resources were available online and use them as well.  One of the reasons that we are behind on this is that not many articles are available online for AI to digest.  In other fields there is a lot more published.  I would consider some of the Sailing World rules articles, some of the articles on the rules in Dave Dellenbaugh's newsletter.  If I were doing it myself I would add my own articles (https://rcyc.ca/Sailing/Racing/Know_Your_Rules)
2) What have you used it for
I have done a quick experiment with this.  I don't know remember whether it was Claude or CoPilot.  I gave it the RRS and the standard wording.  I then gave it the facts founds by a fairly experienced protest committee and asked AI to write the conclusions.  Some parts were correct and in fact did better than the original protest committee.  Some parts need correction.  
I have used AI to help me review NoR and SIs.  For example I have asked "For major regatta's for xyz class do they modify such and such in the NoR"  I have been returned NoRs with and without the modification.  This can be very helpful.
I did try to use it to generate a pairing list for match racing.  It didn't do well at all.  

Rule 89.2 provides the option to change the NoR provided adequate notice is given.

As brought out by John d Farris, any change needs to be communicated to all stakeholders.

I was responding to your question about QR codes.