These Regulations have been adopted by the Minister on the basis of particular provisions laid down in Environmental Quality Act 1974, namely Sections 21, 45 and 51. Section 21 entrusts to the Minister the power to specify conditions on discharge, whereas Section 45 regards compounding of offences. These Regulations pursue the control of emission from diesel engines. They are divided into the following Parts: (I) Preliminary; (II) Control of diesel engine on motor vehicle; (III) Smoke emission c