A basic system of forest fire protection standards has been developed. Primary objectives are defined in terms of acceptable burned area. A method is described by which secondary objectives may be calculated in terms of elapsed-time for the performance of specific fire control operations, in order to meet burned area requirements. These objectives are presented in broad outline, and on a nation-wide basis. When applied to individual administrative units, some elaboration and modification may be necessary. Several lines along which local adaptation might be desirable are suggested. Owing to the great diversity of forest values and the great variation in accessibility of forest lands in Canada, the country has been divided into thirteen zones, within which acceptable average annual burning rates have been calculated for experimental, recreational, productive and non-productive forest areas, and for non-forested areas. Twenty-eight productive forest types are recognized. These burned area objectives take into account both values requiring protection and factors which affect the difficulty of protection. They have thus been determined on a basis compatible with the 'least loss' theory of fire control.© The Canadian Institute of Forestry/Institut forestier du Canada. Abstract reproduced by permission.