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.... .~ "-f---'~. 'totr,} .;::,- 00 ~ N ,. , '-' 90-537 (hereinafter "602(a) Storage"). The quantity of 602(a) Storage shall be determined by the Secretary after consideration of all applicable laws and relevant factors, including, but not limited to, the following: (a) Historic streamflows; (b) The most critic,!l period of record; (c) Probabilities of water supply; (d) Estimated future depletions in the upper basin, including the effects of recurrence of critical periods of water supply;, (e) The "Report of the Committee on Probabilities and Test Studies ~o the Task Force on Operating Criteria for the Colorado River," dated October 30, 1969, and such additional studies as the Secretary deems necessary; (f) The necessity to assure that upper basin consumptive uses not be impaired because of failure to store sufficient water to assure de- liveries under section 602(a) (l),and (2) of Public Law 90-537. (2) If, in the plan of operation, either: (a) The Upper Basin Storage Reservoirs active storage forecast. for September 30 of the current year is less than the quantity of 602(a) Storage determined by the Secretary under Article Il(l) hereof, for that date; or (b) The Lake Powell active storage forecast for that date is less than the Lake Mead active storage forecast for that date; the objective shall be to maintain a minimum release of water from Lake Powell of 8. 23 million acre- feet for that year. However, for the years ending September 30, 1971 and 1972, the release may be greater than 8.23 million acre-feet if necessary to deliver 75 million acre-feet at Lee Ferry for the 10-year period ending September 30, 1972. (3) If, in the plan of operation, the Upper Basin St~rage Reservoirs active storage forecast for September 30 of the current water year is greater than the quantity of 602(a) Storage determination for that date, water shall be released annually from Lake Powetl at a rate greater than 8.23 million acre-feet per year to the extent necessary to accomplish any or all of the following objectives: (a) To the extent it can be reasonably applied in the States of the Lower Division to the uses specified In Article IIl(e) of the Colorado River Compact, but no such releases shall be made when the active storage in Lake Powell is less than the active storage in Lake Mead,