Parisian airport authorities on Saturday (4 November) announced new security measures that will go in force on Monday. Rene Brun, director of Charles de Gaulle airport, said that, with few exceptions, no liquid materials will be allowed into the cabin. "It is very important that passengers get ready at home before going to the airport and put all liquids in their check-in baggage", he said. Certain liquid products, up to a maximum of 10cl, will be allowed if kept in a sealed plastic bag. Exceptions to the ban on bringing liquids into cabin luggage include liquid medicines accompanied by a doctor's prescription and baby liquid food. The new measures were adopted to comply with European Commission legislation, and are part of a concerted effort with the United States to deal with the potential threat of liquid explosives being taken onto commercial flights. Paris airport authorities said 500 extra staff will be in place to implement the measures and ensure that passengers abide by them. Other airports around the world have already implemented similar measures following a major police operation at Heathrow airport in London that uncovered a suspected plot to blow up commercial flights using liquid explosives last August.