Upon the approval of appropriate school district personnel, or the approval of the county superintendent of schools as to students under his jurisdiction, and with the written approval of the parent or guardian of the student, a student in grade 11 or 12, who will be at least 17 years of age at the commencement of his junior year, may be employed as an environmental intern by a federal, state, or local agency in California concerned with the regulation of natural resources or with the protection of the environment during the summer vacation period. These agencies shall include, but not be limited to, the Resources Agency, the Agriculture and Services Agency, the Business and Transportation Agency, the Department of Fish and Game, the Department of Conservation, the Department of Parks and Recreation, the Department of Water Resources, the State Water Resources Control Board, the State Air Resources Board, the State Lands Division, California regional water quality control boards, air pollution control districts, mosquito abatement districts, soil conservation districts, local planning agencies, and county and city park and recreation departments.