5 4 ) | 18 practicable in a statement on an individual action. It ensures consideration of cumulative impacts that might be slighted in a case-by-case analysis. And it avoids duplicative reconsideration of basic The program statement can, of policy questions. course, be supplemented or updated as necessary -- to account for changes in circumstances or public policy and to measure cumulative impacts over time. A program statement will not satisfy the require-. ments-of-Section 102, however, if it is superficial or limited to generalities: Where all sionificant issues cannot. be anticipated.or adequately--treated in connection with the program as a whole,.statements of more limited scope will be necessary on _ Subsequent. individual actions in order to complete - <théanalysis,.7~ +7 =: Z eo _ . ~ oo. Caen ss - —-s-— kor: Le “Foe = ~ ml. ~ oe ~~ ee ne ee - = <= aeRecomnend’tjon20;“tnprepaxingstatements, eS —~=-""- 7 “agencies Should give 6afefulattention-to0°" = formulating an appropriate definition of the scope of the project that is the subject of the statement. In many cases, broad program statements will be appropriate, assessing Lene 8 , a a" . ; the environmental effects of a number of __dindividual actions.on a given geographical — area, or thé overall impact*of @ large-scale - = program or chain of contemplated projects, or the environmental implications of research activities that have reached a stage of investment or commitment to implementation likely to restrict later alternatives. Prepara- tion of program statements in these cases should be in addition to preparation of subsequent state. ments on major individual actions wherever such actions have significant environmental impacts that were not fully evaluated in the program statement. rarer mins JUUC He a a EE