(a) Class 4: Minor Alterations to Land. Class 4 consists of minor public or private alterations in the condition of land, water, and/or vegetation which do not involve removal of healthy, mature, scenic trees except for forestry and agricultural purposes. Such actions may include, but are not limited to, the actions under the authority of PRC § 4291.

(b) Class 6: Information Collection. Class 6 consists of basic data collection, research, experimental management, and resource evaluation activities which do not result in a serious or major disturbance to an environmental resource, including but not limited to forest surveys and soil erosion studies. These may be strictly for information gathering purposes, or as part of a study leading to an action which a public agency has not yet approved, adopted, or funded. Such actions may include, but are not limited to, actions taken under PRC §§ 742-745 and PRC §§ 4800-4807 and approval of plans for the management of state forests in accordance with PRC § 4645.

(c) Classes 7 or 8: Actions by Regulatory Agencies for Protection of Natural Resources or Protection of the Environment. Class 7 consists of actions taken by regulatory agencies, as authorized by state law or local ordinance, to assure the maintenance, restoration, or enhancement of a natural resource where the regulatory process involves procedures for protection of the environment, excluding construction activities. Class 8 consists of actions taken by regulatory agencies, as authorized by state or local ordinance, to assure the maintenance, restoration, enhancement, or protection of the environment where the regulatory process involves procedures for protection of the environment, excluding construction activities and relaxation of standards allowing environmental degradation. Such actions may include, but are not limited to: