16In section 2 (police detention)—
(a)in subsection (2), the word "or" at the end of paragraph (a) shall be omitted and there shall be inserted the following new paragraph—
“(aa)when he is detained in pursuance of any other enactment or subordinate instrument; or”;
(b)in that subsection, for the words "for a period of six hours, he shall be informed immediately upon expiry of this period" there shall be substituted the words "he shall be informed immediately upon the termination of his detention in accordance with this subsection"; and
(c)after subsection (3) there shall be inserted the following new subsection—
“(3A)Where a person has previously been detained in pursuance of any other enactment or subordinate instrument, he may not be detained under subsection (1) above on the same grounds or on grounds arising from the same circumstances as those which led to his earlier detention.”.