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 the amount specified in Acts appropriating funds for the Department of Defense for fiscal year 2020. (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. Interdiction of improvised explosive device precursor chemicals Section 1521(b) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232