989.16—Environmental impact statement.
(a)
Certain classes of environmental impacts normally require preparation of an EIS ( 40 CFR 1501.4 ). These include, but are not limited to:
(3)
Substantial environmental controversy concerning the significance or nature of the environmental impact of a proposed action.
(b)
Certain other actions normally, but not always, require an EIS. These include, but are not limited to:
(5)
Development of major new weapons systems (at decision points that involve demonstration, validation, production, deployment, and area or site selection for deployment).
(6)
Establishing or expanding supersonic training areas over land below 30,000 feet MSL (mean sea level).