In this subtitle the following words have the meanings indicated. “Environmental effects report” means a report on each proposed State action significantly affecting the environment, natural as well as socioeconomic and historic. “Historic resources” means those resources included in the Maryland inventory of historic sites. “Proposed State action” means requests for legislative appropriations or other legislative actions that will alter the quality of the air, land, or water resources. It does not include a request for an appropriation or other action with respect to the rehabilitation or maintenance of existing secondary roads. “State agencies” includes the executive and administrative departments, offices, boards, commissions, and other units of the State government and any such bodies created by the State.