other places say they only get to vote if there is a tie
That’s a new one on me. As far as I know, the chair in NSW has a vote, which they can cast at any time, but only one.
It doesn’t make a lot of difference unless the chair’s vote would create a tie which, in NSW would effectively be a veto since a tied vote means the status quo prevails (one good reason for having odd numbers on the committee).
In Victoria, the chair has an extra vote, but only in the event of a tie. For instance, if the vote is 3 v 4 the chair can’t use their extra vote to make it 4 v4 and block the motion. But if the vote is 3 v 3 with their vote, they can use their casting vote for or against the motion.