I had wondered if, when the mandate came down, some state would challenge it by simply adopting a stupid rule, say a 300 pitch limit. No one did, though, which indicated to me that the vast majority now understand the need for pitch counts and the inadequacy of inning limits. There's just the question of how tight those restrictions should be. That was a pretty big step forward.
By a BA article from Feb, Connecticut and Massachusetts hadn't implemented pitch count rules as of yet. Funny, Connecticut has no pitch count limit, but has a days rest guideline based on # of pitches.
Direct from CT Interscholastic Athletic Conference (CIAC) 2017 Baseball regs handout:
"6. Q - Can a pitcher throw more than 110 pitches?
A - Yes, the number of pitches thrown relates to a specific number of days of rest. In Connecticut there is NO maximum pitch count per day because we have faith in our coaches to protect and preserve the safety and welfare of the baseball athletes."
Yet the intent of the new NFHS pitch count rule is to prevent in-game arm abuse by the few bad apple coaches out there ... no real protection to CT HS pitchers on this part of the rule without a max limit of some sort included. Hopefully, CT will revisit/modify the rule after 2017 season.
They do impose 5 days rest for a pitcher exceeding 110 pitches in a game, which is significant esp. come tournament time.