The European Union Referendum Act 2015 (c. 36) was an Act of the Parliament of the United Kingdom that made legal provision for a consultative referendum to be held in the United Kingdom and Gibraltar, on whether it should remain a member state of the European Union or leave the bloc altogether. The Bill was introduced to the House of Commons by Philip Hammond, Foreign Secretary on 28 May 2015. Two weeks later, the second reading of the Bill was supported by MPs from all parties except the SNP; the Bill subsequently passed on its third reading in the Commons on 7 September 2015. It was approved by the House of Lords on 14 December 2015, and given Royal Assent on 17 December 2015. The Act came partly into force on the same day and came into full legal force on 1 February 2016.