As a bit of a general guide, here is the link to the landmark Qld decision from late last year in which second-hand smoke was declared a ‘hazard’ (there is a specific legislative reference to hazard under Qld strata legislation). The adjudicator’s discussion about the objective basis for saying this might be relevant more generally, in other States: http://www.austlii.edu.au/cgi-bin/viewdoc/au/cases/qld/QBCCMCmr/2021/596.html?context=1;query=artique;mask_path=au/cases/qld/QBCCMCmr