In law, coming into force or entry into force is the process by which legislation, regulations, treaties and other legal instruments come to have legal force and effect. The term is closely related to the date of this transition. The point at which such instrument comes into effect may be set out in the instrument itself, or after the lapse of a certain period, or upon the happening of a certain event, such as a proclamation or an objective event, such as the birth, marriage, reaching a particular age or death of a certain person. On rare occasions, the effective date of a law may be backdated to a date before the enactment.
The Interpretation Act 1978 is an act of the Parliament of the United Kingdom. The Act makes provision for the interpretation of Acts of Parliament, Measures of the General Synod of the Church of England, Measures of the Church Assembly, subordinate legislation, "deeds and other instruments and documents", Acts of the Scottish Parliament and instruments made thereunder, and Measures and Acts of the National Assembly for Wales and instruments made thereunder. The Act makes provision in relation to: the construction of certain words and phrases, words of enactment, amendment or repeal of Acts in the Session they were passed, judicial notice, commencement, statutory powers and duties, the effect of repeals, and duplicated offences.
