; and (2) in the case of an exercise of such authority subject to the limitation in subsection (a)(2), a written justification for the contractor conversion that includes a comparison of whole-of-government costs. 104. Intelligence Community Management Account (a) Authorization of appropriations (1) Fiscal year 2018 There is authorized to be appropriated for the Intelligence Community Management Account of the Director of National Intelligence for fiscal year 2018 the sum of $546,900,000. Within such amount, funds identified in the classified Schedule of Authorizations referred to in section 102(a) for advanced research and development shall remain available until September 30, 2019. (2) Fiscal year 2019 There is authorized to be appropriated for the Intelligence Community Management Account of the Director of National Intelligence for fiscal year 2019 the sum of $539,624,000. Within such amount, funds identified in the classified Schedule of Authorizations referred to in section 102(a) for advanced research and development shall remain available until September 30, 2020. (b) Authorized personnel levels The elements within the Intelligence Community Management Account of the Director of National Intelligence are authorized 797 positions as of September 30, 2018. Personnel serving in such elements may be permanent employees of the Office of the Director of National Intelligence or personnel detailed from other elements of the United States Government. (c) Classified authorizations (1) Authorization of appropriations (A) Fiscal year 2018 In addition to amounts authorized to be appropriated for the Intelligence Community Management Account by subsection (a), there are authorized to be appropriated for the Intelligence Community Management Account for fiscal year 2018 such additional amounts as are specified in the classified Schedule of Authorizations referred to in section 102(a). Such additional amounts made available for advanced research and development shall remain available until September 30, 2019. (B) Fiscal