Longest Senate debates since 1990

MARATHON SENATE DEBATES SINCE 1990

* Howard government changes to native title laws in 1997: 106 hours.

* Introduction of the GST in 1998-99: 69 hours.

* Kevin Rudd's carbon emissions reduction scheme in 2009: 64 hours.

* The Keating government's Native Title Bill in 1993: 52 hours.

* Howard government's workplace relations changes in 1996: 48 hours.

* Labor government money bills in 1992: 40 hours.

* Changes to the way senators are elected in 2016: 40 hours.

* Research involving human embryos in 2002: 36 hours.

(Source: Australian Parliament website).