Washington Contractor Registration Officers/Members Addendum is a document that outlines the specific requirements for any contractor working in the state of Washington. It includes information on registration, licensing, and insurance requirements, as well as other relevant topics, such as safety and health regulations. There are two types of Washington Contractor Registration Officers/Members Addendum; the General Addendum and the Specialized Addendum. The General Addendum includes general information about contractor registration and licensing, along with safety and health regulations, while the Specialized Addendum includes specific requirements for contractor registration and licensing, as well as specific information related to the contractor's field of work (e.g., electrical, plumbing, etc.). Both documents are essential to ensure that contractors in the state of Washington are compliant with all applicable laws and regulations.