What’s this about? It’s one of those parliamentary rules the public would no doubt never hear of until something like this happens.
What’s the reasoning behind the locking of the doors and why are humans being restrained from doing so in that moment?
It's so there is an orderly clear vote counting process in parliament. In people and come and go during counting there is potential for confusion. Members of parliament have a voting records that is recorded (which is why the MPs were trying to leave so they would not have a stance recorded on the record, being merely absent,.) There clear step by step process for voting in Parliament, the bells are wrong, in the chamber as well as party rooms, lobby and members offices so members know a vote is happening.
If people can enter and leave during a vote, what happens when one leaves or enters during the votes being counting, who exactly is eligible in the this vote. If you start letting people arrive late it;s a slippery sloe of confusion. Locking the doors eliminates doubt and confusion, those in the chamber vote. Vote tallies can be checked and a definite decision reached. If can come and go one side might insist on recounting the vote tallies to go a member more time to arrive. Locking the doors eliminates any shenanigans and makes the process clear. https://peo.gov.au/understand-our-parli ... on-is-heldhttps://peo.gov.au/understand-our-parli ... arliament/