; and (ii) activities conducted under such authority. (3) Notice to Congress The Secretary shall notify the congressional defense committees of any material modification to the procedures established under paragraph (1). ; (3) by inserting after subsection (e), as redesignated, the following new subsection (f): (f) Notification Not later than 15 days before exercising the authority in this section to make funds available to initiate a new operational preparation of the environment activity or changing the scope or funding level of any support for such an operation by $1,000,000 or an amount equal to 20 percent of such funding level (whichever is less), or not later than 48 hours after exercising such authority if the Secretary determines that extraordinary circumstances that impact the national security of the United States exist, the Secretary shall notify the congressional defense committees of the use of such authority with respect to that activity. Any such notification shall be in writing.