In paragraph 3(1) for the words from “and if he is not” to the end substitute—“and, if he is not a British citizen, for the purpose of establishing—

(a)

his identity;

(b)

whether he entered the United Kingdom lawfully;

(c)

whether he has complied with any conditions of leave to enter or remain in the United Kingdom;

(d)

whether his return to the United Kingdom is prohibited or restricted.

(1A)

An immigration officer who examines a person under sub-paragraph (1) may require him, by notice in writing, to submit to further examination for a purpose specified in that sub-paragraph.”

After paragraph 16(1A) insert—

“(1B)

A person who has been required to submit to further examination under paragraph 3(1A) may be detained under the authority of an immigration officer, for a period not exceeding 12 hours, pending the completion of the examination.”