22. If in any proceedings for divorce, judicial separation or nullity of marriage the respondent alleges and proves any such fact as is mentioned in paragraph (2) of Article 3 or in Article 13(1) or Article 14 (treating the respondent as the petitioner and the petitioner as the respondent for the purposes of the said paragraph (2), and treating the petitioner as the respondent for the purposes of paragraph ( b), ( e) or ( f) of Article 14), the court may give to the respondent the relief to which he would have been entitled if he had presented a petition seeking that relief.