Type Approval controls of legally regulated measuring instruments (such as supermarket scales, fuel dispensers, taximeters, water and electricity meters) are performed by national metrological authorities and aim at ensuring that the instruments fulfill prescribed requirements. The ASEAN Guidelines on Type Approval Control are designed to serve as a common reference document for ASEAN Member States in developing and operating Type Approval Controls on weighing and measuring instruments, which will facilitate the movement of measuring instruments within ASEAN without compromising the protection of the consumers.