Book excerpt: This report explains the provisions of the Uruguay Round Agreement on Agriculture as they relate to domestic support, concentrating on the aggregate measurement of support and the exemptions of certain support from the measurement. The report highlights the domestic support information provided by Canada and also examines major domestic support issues that may be the subject of discussion in the continued negotiations on agricultural trade liberalization. Issues discussed include special & differential treatment for developing countries, de minimis support, the criteria for exemptions, measurement techniques, and continuing commitments for a ceiling on aggregate measurement of support.