ICC-SRCC’s OG-300 certification program refers to the Operating Guidelines associated with the ICC-SRCC Solar Thermal System Certification Program. The Operating Guidelines (OG) refer to the requirements, policies and procedures associated with the certification program, and are specific to ICC-SRCC. The OG-300 document references the ICC-SRCC Standard 300 document, which sets the technical requirements for the evaluation and rating of solar thermal systems. ICC-SRCC Standard 300 is a generic standard for these systems that is produced by ICC-SRCC but does not require certification to be conducted by ICC-SRCC. The current version of Standard 300 is known formally as ICC 900/SRCC 300 Solar Thermal Systems, and it was approved by ANSI as an American National Standard in 2015. It is currently set to be revised starting in 2019.