When did S.O. 2009 c. 33, Schedule 21, sections 2(4), (7), (8), and (9) come into force?

The correct answer indicates that sections 2(4), (7), (8), and (9) of S.O. 2009 c. 33, Schedule 21 came into force on July 1, 2010. This date is integral in understanding the timeline and implementation of these specific provisions within the Ontario Building Code framework, which impacts when various regulations and requirements take effect for building projects.

Understanding the timing of such legislative changes is crucial, as this can affect planning, design, compliance measures, and inspection processes for future construction projects. July 1, 2010, marks the moment when stakeholders in the building and construction industry were required to align their practices with these new regulations.

The other dates provided do not align with when these specific sections were enacted, which is essential knowledge for anyone working within or studying the Ontario building sector.