If the Planning Board determines that the proposed action is either exempt or a Type II action that will not have a significant effect on the environment, the Planning Board shall file and circulate such determination as provided in § 617.12, and thereafter the proposed action may be processed without further regard to these regulations.
If the Planning Board determines that such proposed action may have a significant effect on the environment and is a Type I action, it shall prepare, file and circulate such determination as provided in § 617.12, and thereafter the proposed action shall be reviewed and processed in accordance with the provisions of regulations and Part 617.