Contractors Developed and Established Management System includes all elements - Requirements of reference standards ISO 9001: 2015 of international specifications. Below is a list of reference quality specifications S/No Standard 1 ISO 9001:2015 2 T-Standard Specification for road works 2000 3 4 5 ISO 14001:2015 ISO 9004: 2015 OHSAS 18002:2007 Description Quality Management System – Requirements and standards Series 1000 General Series 2000 Drainage Series 3000 Earthworks and Pavement Layers of Gravel or Crushed Stone Series 5000 Ancillary Roadworks Series 6000 Structures Series 7000 Tolerances, Testing and Quality Control. Environmental Management System – Requirements with guidance for use Quality Management Systems – Guidelines for performance Occupational Health and Safety Management Systems