Constitution of Ireland Article 23

This Article applies to every Bill passed by Dáil Éireann and sent to Seanad Éireann other than a Money Bill or a Bill the time for the consideration of which by Seanad Éireann shall have been abridged under Article 24 of this Constitution.
1. Whenever a Bill to which this Article applies is within the stated period defined in the next following sub-section either rejected by Seanad Éireann or passed by Seanad Éireann with amendments to which Dáil Éireann does not agree or is neither passed (with or without amendment) nor rejected by Seanad Éireann within the stated period, the Bill shall, if Dáil Éireann so resolves within one hundred and eighty days after the expiration of the stated period be deemed to have been passed by both Houses of the Oireachtas on the day on which the resolution is passed.
2. The stated period is the period of ninety days commencing on the day on which the Bill is first sent by Dáil Éireann to Seanad Éireann or any longer period agreed upon in respect of the Bill by both Houses of the Oireachtas.
1. The preceding section of this Article shall apply to a Bill which is initiated in and passed by Seanad Éireann, amended by Dáil Éireann, and accordingly deemed to have been initiated in Dáil Éireann.
2. For the purpose of this application the stated period shall in relation to such a Bill commence on the day on which the Bill is first sent to Seanad Éireann after having been amended by Dáil Éireann.