The Australian Organics Recycling Association (AORA) and the Australian Bioplastics Association (ABA) developed a joint position paper on Certified Compostable Bioplastics.
AORA supports a ban on all single-use non-compostable plastics, including plastic bags of all gauges, agricultural films and packaging which cannot be reused, recovered or recycled in any way. The use of compostable bags and plastics which meet the requirements of AS4736 and AS5810 as verified by the Australasian Bioplastics Association allows for safe, effective source separation acceptable for organic resource processing/recycling.
Conventional plastics such as polyethylene are not certified compostable and are not biodegradable in any context. Varieties of polyethylene containing additives, such as those called oxo-degradable or oxo-biodegradable are not certified compostable and are not suitable for normal organic processing/recycling operations as they are not biodegradable.