These sanitation standards for the manufacture of dry milk products intended for use in the commercial preparation of Grade A pasteurized milk products have been developed as a supplement to the Milk Ordinance and Code--1953 Recommendations of the Public Health Service. Like the parent document, this supplement has the approval and endorsement of the U.S. Department of Agriculture and is recommended by the Public Health Service, U.S. Department of Health, Education, and Welfare, for voluntary adoption by States, counties, and municipalities. Modern milk drying techniques have made possible the manufacture of high quality dry milk products suitable for use in the commercial preparation of milk products such as reconstituted milk, reconstituted skim milk, cultured buttermilk, flavored reconstituted dairy drinks, special dietary products containing added milk solids, and cottage cheese. The National Conference on Interstate Milk Shipments requested the Public Health Service to cooperate with representatives of the Conference and the dry milk industry in drafting sanitary standards for the manufacture of Grade A dry milk products. The Service agreed to undertake the development of such standards.