Implementing Guidelines for the Mandatory Certification of Portable Type Fire Extinguishers covered by (1) PNS 15-1:1989, Portable fire extinguishers - Specification Part 1: Dry Chemical, (2) PNS 15-3:1991, Portable fire extinguishers - Specification Part 3: Carbon dioxide, (3) PNS 15-4:1991, Portable fire extinguishers - Specification Part 4: Foam and (4) PNS 15-5:119 with Amd 01:1997, Clean extinguishing agent - Part 5: Halon substitute portable fire extinguishers - Specification