http://www.legislation.gov.uk/uksi/2004/755/schedule/paragraph/6/made

The Immigration (Restrictions on Employment) Order 2004

Immigration and nationality

Passports and visas

Immigration control

Work permits

Citizenship

King's Printer of Acts of Parliament

2015-05-22

IMMIGRATION

Section 8 of the Asylum and Immigration Act 1996 (“the 1996 Act”) provides that an employer commits an offence if he employs a person subject to immigration control who has attained the age of 16, if the employee has not been granted leave to enter, or remain in, the United Kingdom, or if his leave is not valid and subsisting or is subject to a condition precluding him from taking up employment.