Liberals have no written rules for spill

HOW A FEDERAL LIBERAL LEADERSHIP SPILL WORKS:

- 102 members of parliamentary Liberal party gather for special meeting at Parliament House in Canberra at 9am (AEDT) on Monday.

- West Australian MP Luke Simpkins will move a motion to spill all leadership positions. Fellow WA MP Don Randall will second it.

- Prime Minister Tony Abbott has indicated a secret ballot will be held on the motion.

- Whip and deputies count votes and tell party room of the result.

- If the spill fails, the result will be reported to the media.

- If the spill succeeds the positions of leader and deputy are declared vacant.

- Likely to be an immediate call for nominations and a ballot for leader and deputy.

- Liberals have no written rules, only conventions.