High Court to begin cases against senators

The High Court will turn its attention to the eligibility of two senators as parliament returns for the final sitting fortnight of the year.

A directions hearing for former Family First senator Bob Day and One Nation senator Rod Culleton is set down for Monday in Canberra at 11.30am AEDT before chief Justice Robert French.

Senator Culleton is being taken to the Court of Disputed Returns by the federal government over his alleged ineligibility to run for parliament in the July election because of a larceny conviction at the time.

Mr Day's eligibility is being challenged on the grounds he received an indirect benefit from the government in relation to his Adelaide electorate office.

Senator Culleton, who will be representing himself, has called for a postponement of the case against him arguing it will be in breach of the Parliamentary Privileges Act for him to appear on a sitting day.