The "fault theory" of divorce requires one spouse (the petitioner) to prove that the other spouse (the respondent) has committed a matrimonial "fault" or offence. Section 13(1) of the Hindu Marriage Act, 1955, is the primary provision embodying this theory. It lists several fault-based grounds for divorce, such as adultery, cruelty, desertion, conversion to another religion, and incurable leprosy. In contrast, Section 13B provides for divorce by mutual consent (a no-fault theory), and Section 11 deals with void marriages. Section 13(2) gives additional fault-based grounds to the wife, but 13(1) is the general section for fault theory.