The federal government says some new cruise ship pollution measures are now mandatory, but environmental groups say the move still doesn't plug gaps that permit the ongoing contamination of some of Canada's most sensitive coastlines. Minister of Transport Omar Alghabra announced Friday that voluntary measures established last April on the discharge and treatment guidelines for sewage (black water) and grey water - which includes kitchen water, laundry detergent, cleaning products, food waste, cooking oils and grease as well as hazardous carcinogens and other pollutants - will be mandatory immediately under an interim order.