This is what I know but I'm not a lawyer:
HAs to be a sanctioned match, NRA, USPSA and IDPA seem to meet the criteria.
Match letter is helpful, mostly if you get stopped.
NY like most all states has a caveat regarding sanctioned matches in the law ( I do not have the #'s etc)
Gun CAN NOT be carried for PD, can only be used at the range where the match is.
YES as stated above this does not include NYC or surrounding area, as even permit holders from other parts of the state
cannot carry in NYC legally!
Yes gun has to be bagged/cased and should not be readily accessible, obviously this portion is very subjective, short of locked in a trunk. etc etc
As per the recent match and speaking to the MD earlier today.
Mike Harding from WNYPPL should be a better resource than I am. As he has folks from Canada and PA at every match they have.
Look up WNYPPL on Practiscore for his info.
Hopefully he will have the law #'s etc to help y'all out.