5. In regulation 32 (travelling time treated as duty) for paragraph (1) substitute—
“(1) This regulation applies to a member of a police force where—
(a)a shift consists of two separate periods, or
(b)he is recalled to duty between two shifts,
and he travels to and from his home between those periods or, as the case may be, in consequence of his recall (in this regulation referred to as “relevant travelling”).”.