The national president acts as chair and has a casting vote in the event of ties.
If a casting vote is available, this may be used to break the deadlock.
Some countries have abandoned the concept of a casting vote.
Well if there was a tie, the speaker could give a casting vote, couldn't he?
The speaker gave the casting vote for the sentence to stand.
The Chair has the casting vote in the case of a tie.
In the case of a tie, the mayor has the casting vote.
They thus had control of the council on the chairman's casting vote.
It had all the decision of a casting vote.
He or she has the casting vote in the event of a tie.