further , That the total cost to the Department of Homeland Security of any such conference shall not exceed $500,000. 525. None of the funds made available in this Act may be used to reimburse any Federal department or agency for its participation in a National Special Security Event. 526. None of the funds made available to the Department of Homeland Security by this or any other Act may be obligated for any structural pay reform that affects more than 100 full-time positions or costs more than $5,000,000 in a single year before the end of the 30-day period beginning on the date on which the Secretary of Homeland Security submits to Congress a notification that includes— (1) the number of full-time positions affected by such change