Quotas apply only to certain Canadian regions, i.e. those assigned to the Option B of the export regime (which consists of a combined application of export charge + quota). These regions are Ontario, Quebec, Manitoba and Saskatchewan. For regions assigned to Option B, monthly quota volumes are calculated by using a formula specified in Annex 7B of the 2006 Softwood Lumber Agreement between the Government of Canada and the Government of the United States: a region's monthly quota = monthly expected US consumption x the region's share of US consumption x price adjustment factor. Allocation Method Order - Softwood Lumber Products (SOR/2007-166); and Notices to Exporters No.160: Softwood Lumber Exports to the United States: Applications for an Export Allocation. .