There will be Brahmanas present who will be pure, wise, learned, righteous and free from desire. One should always perform acts and rites that are recommended by such Brahmanas. If there is doubt about the acts or rites performed by others, one should resort for advice to Brahmanas who are pur, wise, learned, righteous and free from desire. That is what is recommended. That is the advice given. That is what the Vedas say. That is the will of the gods.All rites must be performed in accordance with this dictum.