Under the Explanation to Section 27(1)(e)(b) of the Special Marriage Act, 1954, psychopathic disorder…

Clause (b) of the Explanation to section 27(1)(e) defines "psychopathic disorder" as "a persistent disorder or disability of mind (whether or not including sub-normality of intelligence) which results in abnormally aggressive or seriously irresponsible conduct on the part of the respondent", whether or not it requires or is susceptible to medical treatment. Arrested or incomplete development of mind and schizophrenia fall within the wider term "mental disorder" in clause (a).