s 25 Interpretation
In sections 15 to 24— (a) “ adult ” means a person who has attained the age of 16, (b) a reference to employment is to employment under a contract of service or apprenticeship, whether express or implied and whether oral or written, (c) a person is subject to immigration control if under the Immigration Act 1971 he requires leave to enter or remain in the United Kingdom, and (d) “ prescribed ” means prescribed by order of the Secretary of State.