AATCC M12-2020 provides instruction for the organization and content of AATCC test methods, evaluation procedures, and laboratory procedures. AATCC monographs are not required to follow the style listed in this document though it may still serve as a useful guide. This document includes general guidelines and examples to cover most cases. Committees should consult with AATCC RA99 and/or ECR to address special cases requiring modification of the guidelines.