FDA "official" methods : methods found in compendia specified in FD&C Act and prescribed in the CFR. Methods in applications and petitions that have official status are included. These include those in the United States Pharmacopeia, National Formulary, Homeopathic Pharmacopeia of the United States, Official Methods of Analysis of the Association of Official Analytical Chemists (AOAC) International or any supplement of any of them, American Public Health Association (APHA) Compendium of Methods for the Microbiological Examination of Foods, FDA compliance programs, the Pesticide Analytical Manual (PAM, the Food Additives Analytical Manual, the Food Chemical Codex, FDA Bacteriological Analytical Manual (BAM), FDA Macroanalytical Procedures Manual (MPM), and ORA. Laboratory Information Bulletins (LIBs) are included in compliance programs and special assignments. Standard method are preferred for use and verified of use in the laboratory. To ensure consistent application, a standard method may be given with additional details in the form of a laboratory procedure. Methods specified by the manufacturer of the equipment are considered as standard methods. Standard procedures are verified using the procedures described above.