How do judges interpret Acts of Parliament, and which rules and aids do they use?
Statutory interpretation: the literal, golden and mischief rules, the purposive approach, the rules of language, and the internal and external aids to interpretation.
An OCR A-Level Law guide to statutory interpretation. Explains the literal, golden and mischief rules, the purposive approach, the rules of language and the internal and external aids, with key cases, worked exam answers and the AO2 application the paper rewards.
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What this dot point is asking
OCR Component 2 Section A requires you to know how judges interpret the words of an Act when their meaning is disputed. You must know the three rules (literal, golden, mischief), the purposive approach, the rules of language, and the internal and external aids to interpretation. The skill is to apply these rules to a disputed word in a scenario for AO2, and to evaluate them for AO3.
The answer
The three rules
The purposive approach
The purposive approach asks what result Parliament intended the Act to achieve, and interprets the words to give effect to that purpose, even if this departs from their literal meaning (Jones v Tower Boot Co, reading "in the course of employment" broadly to protect against discrimination). It is the dominant modern approach, encouraged by the interpretive style of EU law and by section 3 of the Human Rights Act 1998 (reading legislation compatibly with Convention rights so far as possible).
Rules of language and aids
- Rules of language. Ejusdem generis ("of the same kind"): general words following a list of specific words are limited to the same kind (Powell v Kempton Park). Expressio unius est exclusio alterius: expressly mentioning one thing impliedly excludes others. Noscitur a sociis: a word takes meaning from its surrounding context.
- Internal (intrinsic) aids. Material within the Act: the long and short title, the preamble, definition (interpretation) sections, headings and schedules.
- External (extrinsic) aids. Material outside the Act: dictionaries, earlier Acts on the same subject, Law Commission reports, explanatory notes, and Hansard (the record of parliamentary debates), which Pepper v Hart permits where the words are ambiguous or absurd and a minister made a clear statement.
Examples in context
A strong scenario answer applies each rule to the actual word and reaches a conclusion, rather than describing the rules in the abstract.
Try this
Q1. Explain the purposive approach to statutory interpretation and how it differs from the literal rule. [12 marks]
- What the marker wants. Precise AO1: the purposive approach interprets words to give effect to Parliament's intended purpose (Jones v Tower Boot Co), influenced by EU law and s3 HRA 1998, whereas the literal rule applies the plain meaning even if absurd (Berriman).
Q2. A statute bans bringing a "dog" into a food shop. The defendant brings in a domestic cat. Discuss how a judge might decide whether the defendant has committed the offence. [20 marks]
- Cue. An AO2 application: under the literal rule a cat is not a dog (no offence); the mischief and purposive approaches ask whether the Act aimed at hygiene generally (which might cover a cat) or specifically at dogs, so conclude on the likely interpretation and result.
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR H418/02 2019 (Section B scenario)20 marksA statute makes it an offence to use a 'vehicle' in a pedestrian zone. The defendant rides an electric scooter through the zone. Discuss how a judge might interpret 'vehicle' using the different rules of statutory interpretation. [Section B legal scenario, AO2]Show worked answer →
A scenario testing AO2 application of the interpretation rules to a word. Apply each rule to the facts and show the likely result.
Literal rule. Give 'vehicle' its plain, ordinary meaning. A dictionary may include any conveyance, so an electric scooter is likely a vehicle (compare Whiteley v Chappell and LNER v Berriman, where the literal rule produced harsh results).
Golden rule. If the literal meaning produces an absurdity, modify it (narrow approach where there are two meanings, R v Allen; wide approach to avoid an absurd result, Re Sigsworth). Here the literal result is not absurd.
Mischief rule and purposive approach. Ask what mischief the Act aimed to remedy (Heydon's Case; Smith v Hughes). If the aim was to protect pedestrians from moving conveyances, a scooter falls within it, supporting liability. The purposive approach (Coltman style) reaches the same result by focusing on Parliament's aim.
A top answer applies each rule to the facts and reaches a reasoned conclusion on whether the scooter is a vehicle.
OCR H418/02 2021 (Section A style)12 marksExplain the literal rule and the mischief rule of statutory interpretation. [a medium-tariff Section A question; true tariff varies between 10 and 15 on the real paper]Show worked answer →
A Section A knowledge question, mainly AO1, rewarding precise definitions with cases.
The literal rule. Judges give words their plain, ordinary, grammatical meaning, even if the result is harsh or absurd (Whiteley v Chappell, where a dead person was not 'entitled to vote'; LNER v Berriman, where oiling was not 'relaying or repairing').
The mischief rule. From Heydon's Case, the judge looks at the common law before the Act, the mischief the Act was meant to remedy, and the remedy Parliament intended, then interprets the words to suppress the mischief (Smith v Hughes, where soliciting 'in a street' covered prostitutes calling from balconies).
A top answer defines each rule and supports it with the leading cases.
Related dot points
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- The legal problem scenario question (AO2): identifying the legal issues, stating the relevant law with authority, applying it to the facts, and reaching a reasoned conclusion using the IRAC or define-apply-conclude structure.
An OCR A-Level Law guide to the legal problem scenario question. Explains how to identify the issues, state the law with authority, apply it to the facts and conclude, using the IRAC structure, with a worked example and the AO2 application the paper rewards across all three components.
Sources & how we know this
- OCR A Level Law (H418) specification — OCR (2017)