Approval for appointment of CHA personnel required, with antecedent and character certificates and AC/DC authorization for employment. Appointment of persons to assist in Customs work requires prior approval of the designated Deputy Commissioner or Assistant Commissioner of Customs, who shall consider antecedents and character. CHA firms must seek AC/DC approval before appointment and, when applying for Customs Cards (Forms H and G), submit a police certificate of no fraud or pending criminal proceedings, a Gazetted officer character certificate, and an antecedent certificate disclosing any show cause notices or penalties in Customs matters.