It's expected to be completed by the end of the year.
Ethics legislation is to be reviewed by the Department for Public Expenditure and Reform.
Cabinet approved the move today, with Minister Michael Mc Grath stating it will be the first step in delivering on a commitment made in the programme for government.
The review will respond to outstanding recommendations of the Moriarty and Mahon tribunals and more recent developments, such as the Hamilton report recommendations on preventing economic crime and corruption.
It's expected to be completed by the end of the year.