Michigan Air Pollution Control Rule R336.202 (Rule 2) requires an annual report from a commercial, industrial, or governmental source of emission of an air contaminant if, in the judgment of the department, information on the quantity and composition of an air contaminant emitted from the source is considered by the department as necessary for the proper management of the air resources. In addition, other state rules and federal statutes and regulations require sources to report air emissions if certain conditions are met.