What is this form "VAKALAT Form No. 12(121), Rule No. 19(276)" in Tamil Nadu for property law cases

Dear Kaanoon, my ancestral property is in Coimbatore and is under partition case, filed by my father along with his four sisters against my fathers only younger brother who has been residing in that property for the last three years after my grand mother's death. Recently my father expired. Now, one of my fathers sister who has come forward to carry on the case has given a form i.e. VAKALAT From No. 12(121), Rule No. 19(276) to be signed by my Mom and me. Stating that this is the form enabling them to carry on the case in the name of my Mother and me on behalf of my father. Since we both (i.e. My Mom and me) are illiterate in Tamil language, I would like to know what exactly is this form " VAKALAT Form No. 12(121), Rule No. 19(276)" ? PDF file of the form can be send if desired. An early reply shall be solicited. Thanking You Kishore