Micah,
Have you thought about the reaction you will get from a hungry FM who just broke 2400 FIDE and is hoarding rating points as well as seeking 1st prize money at your tournament, because he is close to literally hungry?
“OK, you can play in the event and win first prize. It will impact your US Chess rating…but not your FIDE rating. Them’s the rules.”
I was surprised to hear the FIDE official and Chris Bird say that what you want to do is permitted. But based on their comments I think it safe to say it would be OK.
But why would you do it? Did the players in this event in recent years request that it be FIDE-rated? Do you have enough FIDE-certified arbiters/Senior TDs to handle every game in the top section, every round? Will you bundle the additional fee to FIDE-rate the event into the EF?
Best practice would be to adhere to FIDE rating rules for 2400+ players for any section in which those players may compete, whether they register in advance or show up at the site.
Use of the G/90 and G/60 minimums for lower-rated players should be limited to sections with appropriate rating caps (Under 2400 or Under 1800, as of next year) or events with player fields organized in advance.
There is a part of me that agrees with the argument “with so many rating systems, any time control should be ratable under some system.”
But a FIDE rating should have a certain cachet. It did once, when the minimum FIDE rating was 2200, and even after it was lowered to 2000. Back then, there was just one standard for FIDE ratability, as far as I know. Also just one FIDE rating system, I think. (Pre-Rapid and Blitz.)
To me, G/90 d10 is a decent control for a five-round weekend Swiss, ranging from a club-organized event to the lower end of Grand Prix.
I might blow one of five games by trying to play a “simple” endgame when down to the delay time, but my opponent might do the same. So it goes.
But a FIDE rated event, as we looked at that back in the day…should be serious chess. No more than two rounds per day, at least 120 minutes per game with main time added to delay/increment, preferably a 30-second increment…and no playing the margins just for the sake of saying it’s FIDE-rated.
Not sure what you are trying to accomplish here. Maybe it’s because I am getting old, once had some interest in obtaining a FIDE rating when the minimum was 2000, then lost interest when the minimum dropped way down and I got older and even weaker.
Granted it is permitted to do as you plan: Why?