This document provides information on regulatory requirements for medical devices and radiation services under the Atomic Energy Licensing Act 1984 in Malaysia. It begins with statistics on cancer in Malaysia and the percentage of patients requiring radiotherapy. It then outlines the legislative hierarchy for regulations in Malaysia and describes the Atomic Energy Licensing Act 1984 and its provisions. The document provides numerous guidelines, standards, and circulars issued over the years related to radiology, radiotherapy, and nuclear medicine. Checklists for license applications are also included.