authorized to be appropriated by this title are in addition to amounts otherwise authorized to be appropriated by this Act. 1522. Special transfer authority (a) Authority To transfer authorizations (1) Authority Upon determination by the Secretary of Defense that such action is necessary in the national interest, the Secretary may transfer amounts of authorizations made available to the Department of Defense in this title for fiscal year 2018 between any such authorizations for that fiscal year (or any subdivisions thereof). Amounts of authorizations so transferred shall be merged with and be available for the same purposes as the authorization to which transferred. (2) Limitation The total amount of authorizations that the Secretary may transfer under the authority of this subsection may not exceed $3,500,000,000. (b) Terms and conditions Transfers under this section shall be subject to the same terms and conditions as transfers under section 1001. (c) Additional authority The transfer authority provided by this section is in addition to the transfer authority provided under section 1001. C Other Matters 1531. Afghanistan Security Forces Fund (a) Continuation of prior authorities and notice and reporting requirements Funds available to the Department of Defense for the Afghanistan Security Forces Fund for fiscal year 2018 shall be subject to the conditions contained in subsections (b) through (g) of section 1513 of the National Defense Authorization Act for Fiscal Year 2008 ( Public Law 110–181