With most or all of the ministers expected to speak, the debate could last the entire day, a senior government official said.
Each debate lasted for around one and a half hours.
The debate on the Senate floor lasted less than two hours.
The debate itself begins at 9pm/2am and lasts 90 minutes.
The debate over this change, which was made in 1993, lasted more than a year.
Officials close to the negotiations said each debate would last 90 minutes.
After a debate lasting several hours they sent for Mackenzie.
The debate will last for days, and any number of amendments may be adopted.
The debate in England lasted only for a few years.
The debate would last until the beginning of the 18th century.