; and (B) to meet such deadlines for deployment, the Secretary of the Army may— (i) deploy such systems that require the least amount of development ; and (ii) use any authority of the Secretary relating to acquisition, technology transfer, and personnel management that the Secretary considers appropriate, including rapid acquisition and rapid prototyping authorities, to resource and procure an interim missile defense capability. 3. Authority to procure Iron Dome batteries (a) Authority Pursuant to paragraph (3) of section 112(b) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ), the Secretary of the Army may procure two Iron Dome batteries to carry out paragraph (1)(A) of such section to deploy an interim missile defense capability by not later than September 30, 2020. (b) Authorization of appropriations There is authorized to be appropriated $9,337,000 to the Secretary of the Army to carry out subsection (a).