मत्तोन्मत्तार्ताध्यधीनैर्बालेन स्थविरेण वा । असम्बद्धकृतश्चैव व्यवहारो न सिध्यति ॥ १६३ ॥
A contract made by a person intoxicated, or insane, or grievously disordered (by disease and so forth), or wholly dependent, by an infant or very aged man, or by an unauthorised (party) is invalid.