The
lead agency must determine the environmental significance of each
proposed action. This determination must be based on the EAF, or draft
EIS, and on such other information as it may require, such as drawings,
sketches, maps, explanatory materials, Conservation Board reports,
Town Engineer and/or consulting engineer reports, Planning Board reports,
and other town agency or committee reports. The criteria stated in
Section 617.7 of Part 617 also must be considered by the lead agency
in making its determination of significance. The determination must
be made within 20 days of its designation as lead agency, or within
20 days of its receipt of all information it requires, whichever is
later.