Progress to date and plans: In the five major topic areas (governmental organization, siting, design, operation and quality assurance), the Codes of Practice and a number of the guides have now been completed, and work is in progress on the remaining safety guides. About 10 of these safety guides are expected to be published each year. By 1982 the envisaged set of codes and guides will be complete. The use of the codes and guides in establishing national regulations and international standards will be promoted through the preparation of manuals for their application and through agency participation in national and international meetings