If Nano-material is set to 'Yes' or the default 'Not known' is left untouched when 'Physical state' is either 'Liquid' or 'Gas', the software will now raise an error forcing the user to decide how to deal with their selection choices.
Here is an example error message ...
'Physical state' set to 'Liquid' is inconsistent with 'Nano-material' set to 'Not known' (considered by AICIS as 'Yes')
In the Nano-material field, 'Yes' and 'Not known' both mean it is a nanoscale chemical.
Physical state choices which bypass this error are Solid, Dispersion, Aerosol and Unknown - all of which could involve nanoscale particles.