The Speaker is investigating whether former MP Garry Knapp is eligible for a perk for international travel that he has claimed for almost three decades - but it appears Mr Knapp was eligible for it when he left Parliament in 1987.
The rebates for international travel are currently only available for ex-MPs who served for three or more terms of Parliament and were elected before 1999.
Mr Knapp was an MP from 1980 to 1987 - two and a part terms.
A spokeswoman for the Speaker confirmed he had asked Parliamentary Service for advice on Mr Knapp's eligibility.
However, an old letter from former Speaker Sir Doug Kidd setting out the history of the perk shows that in 1987, when Mr Knapp left Parliament, he was entitled to a 50 per cent rebate on international travel.