John Deere presented document IGPG-02-06 and informed about the need for some clear regulation which could permit forestry machinery manufacturers to approve their mobile machineries once and sell them in all markets (regulatory harmonisation). The expert in addition informed about the particular needs of the forestry tractor windscreens: protection of the operator + wide field of vision. Concerning the protection of the operator, the panes must withstand e.g. penetration by bullets, pieces of chain, deer horns, etc. 12 mm thick PC unfortunately does not provide proper optical performance.