FLEX Batting - NFHS

[CecilOne]

1) The FLEX is already in the game, not coming from the bench and is a special case and can not be announced after being in position, like other players can. BOO requires being in the batting order, not just materializing and the special rule for DP/FLEX overrides the unreported sub rule.

As above (my bold):
"Rule 3-3-6g Placing the FLEX into one of the first nine positions for someone other than the original DP is considered an illegal substitution. The illegal substitute shall be removed from the gaame and restricted to the doug/bench. See Rule 2-57-2 for additional penalities.
Rule 2-57-2...Illegal Substitue. An illegal substitute is:
c. (FP) the FLEX who enters the game as a batter or runner in a different position in the batting order than the DP."

So the coach can't do a delayed report.

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2) I also disagree with "coach cannot say that SUB1 will bat for the DP because that would be a projected substitute"; regardless of whether it is a DP/FLEX or any other position. A sub can replace a player at any position at any time (dead ball, etc.) and DP is a position. Of course, once the SUB 1 for DP is stated, the previous DP can not play (O or D).