Independent egg-law explainer — not affiliated with the 2012 Legal Eggs campaign or the British Egg Industry Council.

Last reviewed: October 13, 2026 · Not legal advice

EU legislation: the battery cage ban

The European Union’s rules for laying hens are set by Council Directive 1999/74/EC of 19 July 1999 laying down minimum standards for the protection of laying hens. It entered into force on 3 August 1999 (EUR-Lex) and gave producers more than twelve years to phase out conventional battery cages.

What the Directive requires

System	Article	Key requirement
Unenriched (conventional battery) cages	Art. 5	At least 550 cm² per hen. No new unenriched cages built or brought into service from 1 Jan. 2003; rearing in them prohibited from 1 Jan. 2012.
Enriched cages	Art. 6	From 1 Jan. 2002: at least 750 cm² per hen, of which 600 cm² usable; a nest; litter for pecking and scratching; perches giving at least 15 cm per hen; at least 20 cm high at every point.
Alternative (non-cage) systems	Art. 4	Maximum of nine laying hens per m² of usable area (transitional allowance of up to 12 per m² for certain existing establishments until 31 Dec. 2011).
Scope	Art. 1	Does not apply to establishments with fewer than 350 laying hens or to those rearing breeding laying hens.

The provisions above are summarized from the Directive’s text on EUR-Lex. The Directive did not ban cages altogether: it banned unenriched cages and set higher standards for enriched cages, alongside “alternative” non-cage systems.

Key definitions

Much of the Directive turns on the idea of usable area. Article 2 defines it as area at least 30 cm wide with a floor slope of no more than 14%, and with headroom of at least 45 cm; nest areas are not counted. The same 45 cm headroom applies between levels in multi-tier alternative systems under Article 4 (EUR-Lex). Usable area is what the nine-hens-per-square-metre limit in non-cage systems is measured against.

Outside the EU, some neighbouring countries followed the same timetable: Norway’s national prohibition on conventional cages took effect on 1 January 2012 as well (Wikipedia).

The phase-out timeline

Date	Milestone
19 July 1999	Directive adopted by the Council
3 August 1999	Directive enters into force
1 January 2002	Enriched-cage standards apply to enriched cages
1 January 2003	No new unenriched cages may be built or brought into service
31 December 2011	End of transitional density allowance in alternative systems
1 January 2012	Rearing hens in unenriched (battery) cages prohibited

Why it mattered in 2012

The ban was widely publicized as an end to caged hens in Europe, but Wikipedia’s summary notes that producers complied by moving to slightly larger enriched cages, and that Compassion in World Farming argued enriched cages offer no significant welfare benefit over conventional ones (Wikipedia). More immediately, several member states were not ready when the deadline arrived. In November 2011 the UK farm minister Jim Paice noted that more than a third of EU caged hens were predicted to still be in conventional cages on 1 January 2012 (FarmingUK). The European Commission opened infringement proceedings against 13 member states in January 2012 — the story told on the 2012 enforcement page.

How it compares with US law

The EU rule is a single, EU-wide housing standard. The United States has no federal equivalent; hen housing is regulated state by state, and the strongest state laws go further than the EU by requiring cage-free systems rather than enriched cages. See US state cage-free laws. Washington’s pre-2019 law, for example, had allowed enriched colony housing with at least 116.3 square inches per hen before HB 2049 moved the state to cage-free (WA bill report).