Just to stir the mud a bitIndeed.
In fact the regulation goes on to say in Note 1:
"Higher risk residential buildings are ASSUMED to be....etc";
"It is ANTICIPATED that in many areas higher risk residential buildings will be defined in legislation which can be subject to change over time..."
About as clear as mud.
Does "in many areas" mean that in diiferent locations around the country there is a higher risk of arc faults or is it many areas of a building depending on it's residential status may be more at risk