The document describes the five modules of the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Common Technical Document (CTD) format for ASEAN countries. Module 1 contains regional administrative information. Module 2 provides an overall summary of Modules 3, 4, and 5, including quality, non-clinical, and clinical overviews. Module 3 includes chemistry, manufacturing, and quality control documents. Module 4 contains non-clinical safety data. Module 5 provides clinical study reports, though generics only need to include bioequivalence studies. The CTD format is required for both new drug and generic applications in ASEAN countries.