Applicability of order 12 rule 6 for divorce decree

Dear Sir, My wife already admit her acts of cruelty under order 12 rule 6 and I too agreed for it. Now judge is saying that order 12 rule 6 is not applicable in case of divorce decree. Kindly send me or quote any court orders or judgements on order 12 rule 6 for divorce decree..It will be really great help for me. Best Regards