labor hour requirements The Department of Defense may not enter into a contract for the procurement of services valued in excess of $10,000,000 based on specific descriptive personnel and labor hour requirements unless the program manager and contracting officer first submit to the Under Secretary of Defense for Acquisition and Sustainment a written justification including the reasons for basing the contract on those requirements instead of outcome- or performance-based requirements. (b) Comptroller General report Not later than two years after the date of the enactment of this Act, the Comptroller General of the United States shall submit to the congressional defense committees a report on justifications submitted pursuant to subsection (a). The report shall review the adequacy of the justifications and identify any reoccurring obstacles to the use of outcome- and performance-based requirements instead of specified personnel and labor hour requirements for purposes of awarding services contracts. (c) Sunset The requirements under this section shall terminate at the close of September 30, 2022. 819. Pilot program for longer term multiyear service contracts (a) In general The Secretary of Defense may use the authority under subsection (a) of section 2306c of title 10, United States Code, to enter into up to five contracts for periods of not more than 10 years for services described in subsection (b) of such section. Each contract entered into pursuant to this subsection may be extended for up to five additional one-year terms. (b) Study (1) In general Not later than 90 days after the date of enactment of this Act, the Secretary of Defense shall enter into an agreement with an independent organization with relevant expertise to study best practices and lessons learned from using services contracts for periods longer than five years by commercial companies, foreign governments, and State governments, as well as service contracts for periods longer than five years used by the Federal Government, such as Energy