Section 11
Who are competent to contract
Chapter 3: Of contracts, voidable contracts and void agreements
Every person is competent to contract who is of the age of majority according to the law to which he is subject3, and who is of sound mind, and is not disqualified from contracting by any law to which he is subject.
The Indian Contract Act, 1872 (Act No. 9 of 1872). From the updated text on India Code, with later amendments. Being checked against the official copy; amendment notes are not shown yet.