Notwithstanding any other provision of law (including a regulation), the supervisor of a Bureau-operated school may expend an aggregate of not more than $50,000 of the amount allotted to the school under section
2007 of this title to acquire materials, supplies, equipment, operation services, maintenance services, and other services for the school, and amounts received as operations and maintenance funds, funds received from the Department of Education, or funds received from other Federal sources, without competitive bidding if—