After Appendix C, add a new appendix as follows—

“Appendix D. Method for determination of smouldering rate of cigarette

Condition the cigarette for at least 16 h, immediately before the test, at a temperature of 20°C±5°C and a relative humidity of 50%±20%.

Mark the cigarette at 10mm and 60mm from the end to be lit. Ignite the cigarette and draw air through it until the tip glows brightly. Not less than 5mm and not more than 8mm of the cigarette shall be consumed in this operation. In draught-free air, impale the cigarette horizontally on a horizontal spike inserted not more than 13mm from the unlit end. Record the time taken for the cigarette to smoulder from the 6mm mark to the 60mm mark.”