What does compostable plastics as per EPR mean?

According to the Plastic Waste Management Rules 2016 “Compostable Plastics” mean plastic that undergoes degradation by biological processes during composting to yield CO2, water, inorganic compounds and biomass at a rate consistent with other known compostable materials, excluding conventional petro-based plastics, and does not leave visible, distinguishable or toxic residue.

Category IV compostable plastic is one of the covered streams detailed on the EPR Solutions page.