ASTM Committee G03 on Weathering and Durability was formed in 1965 . G03 meets twice a year, in January and June, with approximately 25 members attending over three days of technical meetings. The Committee, with a membership of approximately 160 , currently has jurisdiction of over 36 standards, published in the Annual Book of ASTM Standards, Volume 14.04 . G03 has 9 technical subcommittees that maintain jurisdiction over these standards. Information on this subcommittee structure and G03's portfolio of approved standards and Work Items under construction are available from the List of Subcommittees, Standards and Work Items below. These standards have and continue to play a preeminent role in all aspects of weathering and durability including: standard conditions, methods and instrumentation, and accelerated testing.