Modified the assignment of DOE internal responsibilities for NEPA compliance including delegating to Assistant Secretaries the responsibility for determining the level of NEPA review for proposals that fit classes of actions listed in Section D of the guidelines and determining “that a proposed action, although not categorically excluded, clearly will not have significant environmental effects and, therefore, does not warrant preparation of an EA or EIS.” (See “memorandum-to-file” in policy SEN-15-90 of 1990-02-02.)