Except for Code books, you can base your answers on later editions of references as they become available. The National Commercial & Industrial Insulation Standards Manual, also known as the MICA Manual, was developed by the Midwest Insulation Contractors Association (MICA) to serve as a useful resource for commercial and industrial insulation professionals. Widely accepted as the industry standard, the manual is a must-have guide for contractors, engineers, architects, and specifiers.