Where, in actual use, the plastic material or article being tested is intended to be used for periods of less than 15 minutes at any temperature of not less than 70oC and not more than 100oC and such use is indicated by appropriate labelling or instructions no test other than for 2 hours at 70oC shall be carried out on the plastic material or article unless the plastic material or article is also intended to be used or storage at room temperature in which case no test other than for 10 days test at 40oC shall be carried out.