Disregarding informant information permitted when antecedents, past conduct, and information quality justify referral and approval. Whether to take cognisance of information from an informant turns on assessment of the informant's antecedents, the nature and reliability of information previously furnished, and the informant's conduct; where those factors indicate non cognisance, the JDIT (Inv.) refers the matter to the PDIT (Inv.) and, if approved, may ignore the information.