16. Requirement for leave to enter and remain.

Non-British citizens1 may live, work and settle in the United Kingdom by permission and subject to such regulation and control of their entry into, stay in, and departure from the United Kingdom as is imposed by the Immigration Act 19712. Generally, a non-British citizen may not enter the United Kingdom without leave3, which may be given either for a limited or for an indefinite period4. An immigration officer, whether or not in the United Kingdom, may give or refuse a person leave to enter at any time before his departure for, or in the course of his journey to,