It comes after an initial report into votegate recommended no further sanctions against the TDs.
An Offaly TD involved in the votegate controversy has made a formal apology to the Dáil.
It comes after an initial report into the incident recommended no further sanctions against the TDs.
Two Fianna Fáil TDs voted twice in a debate last week on behalf of absent colleagues.
A further investigation into the controversy is being carried out.
Fianna Fail deputy Barry Cowen apologised to the Dail and the people of Offaly
TDs have been warned voting irregularities in the Dáil can't be allowed to happen again.
Changes to voting rules were introduced this afternoon following a report into phantom voting by some Fianna Fáil TDs.
The report recommended no disciplinary action but said there should be a review of how TDs vote.
Ceann Comhairle Sean O Fearghail said the whole vote gate incident has undermined the credibility of the Dáil.
Fine Gael party chairman Martin Heydon was critical of the actions of the Fianna Fáil TDs.
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