The Oregon Building Codes Division has the authority to approve and adopt codes and proposed code amendments. The state building code is derived from the most appropriate version of base model codes, which are adopted approximately every 3 years from the last Oregon specialty code effective date. Oregon adopted the OR Residential Specialty Code (ORSC) effective July 1, 2011 and the OR Energy Efficiency Specialty Code (OEESC) for commercial buildings effective July 1, 2010. Oregon has also adopted a commercial reach code, which became effective July 1, 2011. This is a voluntary code based on the International Green Construction Code. Oregon is one of the few states that now has a reach code based on the baseline code, which has exceeded the IECC version for the last two code cycles.