In our local league we have 3 different age categories, 50,58 and 63. You can play down from your category.
The issue is we have players who pay 50's who's skills are greatly diminished.
Can the board make determinations on whether a player, for their own safety be disallowed to play in the lower age division based on extreme safety issues i.e. limited running, catching, throwing and fielding ability. Would this be considered age discrimination ( other employees restrict duties such as military, airline pilots, etc). Where does the liability begin and end for the league regarding safety and possible discrimination?

I would suggest that you reach out to a Human Resources or Discrimination Attorney to be 100% safe. Our society has become so litigious its ridiculous.

My suggestions would be as follows:

1. Set it such that you are only allowed to play one category down. But you may apply for
a waiver pending a hearing.

2. Pass rule at the Board level, and make it be known that you are considering a rule where
the board or umpires can recommend that your ability to play down is being rescinded based
on safety concerns, but you can appeal and request a hearing in front of the board.

This is me applying my corporate background to a kid's game. So consider it being my $.02.

Hope you find a good solution.

Bill