The Philippine Grid Code establishes and documents the basic rules, requirements, procedures and standards that govern the operation, maintenance and development of the high-voltage backbone transmission system in the Philippines. The Grid Code identifies and recognizes the responsibilities and obligations of three (3) key independent functional groups, namely (a) Grid Owner, (b) System Operator and (c) Market Operator. These functional groups and all Users of the Grid must comply with all the provisions of the Grid Code.