In determining the flash point for the purposes of these Regulations Part IV of Schedule 1 to the Classification, Packaging and Labelling of Dangerous Substances Regulations (Northern Ireland) 1985 shall apply as if for paragraph 4(6) of that Part there were substituted the following sub-paragraph—
b
by one of the non-equilibrium methods referred to in paragraph 6, except that when the flash point falls within the range 30°C to 34°C that flash point shall be confirmed by the use of the like apparatus using the appropriate equilibrium method referred to in paragraph 5.