The [1967 c. 60.] Sexual Offences Act 1967
34In section 1—
(a)in subsection (3) for the words " severe subnormality ", in both places, there shall be substituted the words " severe mental handicap " and the words " within the meaning of the Mental Health Act 1959 " shall be omitted ;
(b)after subsection (3) there shall be inserted—
“(3A)In subsection (3) of this section ' severe mental handicap' means a state of arrested or incomplete development of mind which includes severe impairment of intelligence and social functioning.”