Parliament of the United Kingdom, Sexual Offences Act 1967 (1967)
“ A man who is suffering from severe subnormality within the meaning of the Mental Health Act Act, 1959 [1] cannot in law give any consent which, by virtue of subsection (1) of this section, would prevent a homosexual act from being an offence, but a person shall not be convicted, on account of the incapacity of such a man to consent, of an offence consisting of such an act if he proves that he did not know and had no reason to suspect that man to be suffering from severe subnormality. ”
