Yes. In public schools, activities organised outside of the direct responsibility of the Principal, are not required to adhere to the HFD policy, such as P&C fundraising. However, schools are encouraged to create a whole school approach to healthy eating. There are loads of fundraising ideas with healthy food/drinks or non-food items. See the fundraising booklet located here for some healthy options.
Note: fundraising organised by the school (i.e. not the P&C) should comply with the HFD policy.