Call No-Dig Depot on 1800 048 866 and we can help you better understand what your legal obligations are, and what you need to do to keep your business safe from adverse legal action. The WaterMark standard is now enforceable so if your supplier can’t give you their WMTS-518 Certificate Number, they’re setting you up for disaster. Suppliers should have, and you must have it by now or the products you use are considered illegal.