Clay could you check my understanding on this.
*The first mining year ended Sept. 1st 2019.
*He needs to file a Notice of Intent to Hold for the above mentioned year, because the claim was located during the current assessment year (reason C in my previous post).
*The Small Miners Waiver was filed for the mining year ending Sept. 1st, 2020.
*Once the assessment work is complete (for the mining year ending Sept. 1st, 2020), he would file an Affidavit of Assessment Work (prior to Dec. 30th 2020).
Of course he would have to either pay his maintenance fee or file a Small Miners Waiver prior to Sept. 1st, 2020 for the subsequent mining year.
Do I have that correct?
Sort of...
The NOI is in lieu of a labor assessment. It doesn't matter that the claim was located the previous mining year. The Notice of Intent to Hold Mining Claim is always required in the first year of a small claims waiver.
It's just your reasoning that's off - all the actions and dates you state are correct.
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The reason this gets so confusing is because the Federal mining year begins in September. So we have been in the 2020 federal mining year since last September even though it's been 2019 calendar year all that time.
You also have a State mining year that's different from the Federal Mining year. Those State mining years vary from State to State. In Arizona the mining year runs from December 31 to December 30... Yeah just one day short of the calendar year.

Other States have their own thing. I think California runs from October 1 to September 30. Nevada is November 2 - November 1. Colorado is the same as Arizona. etc. etc. !!(Check your state's laws)!!

So you are really talking about providing a copy of the State required annual public record labor affidavit - according to State law - to the State BLM office by December
30th.
Congress could have made that notice required by the last day of the year (December 31st) and we could just compare a calendar year to a federal mining year. Instead Congress in their infinite wisdom was asleep the day the law passed and nobody noticed that there were actually 31 days in December.

(OK Congress may not have been asleep and there could be deep meaning or symbolism to December 30th but I'm sticking with my asleep theory until someone comes up with a better story)
I have no theories I'm willing to share publicly why each State has decided on different dates for their mining years.
If you get the feeling you are being messed with by unseen forces...........
Heavy Pans