.-(1) The testing officer shall test the samples in the manner laid down in the Indian Standard Specification No. IS-1448 (Part I): (P 20) or (P 21), as applicable, and for the time being in force.(2)In all cases at least three samples shall be separately tested, the average of the three readings being corrected for the thermometer correction, if any, and for the barometric correction in case of dispute.(3)If the average flash point is not lower than 230C, the whole of the petroleum represented by the samples shall be deemed to be petroleum Class B or petroleum Class C according to the average flash point determined by the test.(4)If the petroleum to be tested is viscous or solid or contains sediments or thickening ingredients, such petroleum shall be tested in accordance with the methods specified in the Fifth Schedule.
