4In section 20 (renewal of detention or guardianship)—
(a)in subsection (4)(a), for “mental illness, severe mental impairment, psychopathic disorder or mental impairment, and his mental disorder is” substitute “mental disorder”, and
(b)in subsection (7)(a), for “mental illness, severe mental impairment, psychopathic disorder or mental impairment and his mental disorder is” substitute “mental disorder”.