For the solemnisation ceremony, the couple should be properly dressed in an attire that befits the solemnity of marriage. Proper attire includes shirt and pants or other formal male attire for the groom, and a dress or other formal female attire for the bride. Couples should not be dressed in an indecent or inappropriate wear. The solemniser may decline to proceed with the solemnisation if he/she feels your attire is inappropriate for the occasion.