The AfOR compost certification rules highlight the circumstances under which compost can be considered a ‘product’ and when it is regarded as ‘waste’ and remark that any composts sold in England and Wales for any use must comply with the PAS 100 & CQP (the British Standards Institution's Publicly Available Specification for Composted Materials and the Environment Agency and Waste and Resources Action Programme's Compost Quality Protocol). Composts sold in Scotland and Northern Ireland for any use must comply with PAS 100 only. Otherwise the compost must be handled as wastes – this includes composts sold through garden centres or other retail outlets.