; and (B) the technical needs and capacities of the acquisition workforce, as applicable. (d) Terms Exchanges pursuant to the exchange program established under subsection (a) shall be for terms of one to two years, as determined and negotiated by the Under Secretary. The terms may begin and end on a rolling basis. (e) Guidance and implementation (1) Guidance Not later than 90 days after the date of the enactment of this Act, the Under Secretary shall develop and submit to the congressional defense committees interim guidance on the form and contours of the exchange program established under subsection (a). (2) Implementation Not later than 180 days after the date of the enactment of this Act, the Under Secretary shall implement the guidance developed under paragraph (1). E Provisions relating to commercial items 851. Report on commercial item procurement reform (a) Report required Not later than March 1, 2020, the Assistant Secretary of Defense for Acquisition, in consultation with members of the Defense Business Board as appropriate, shall submit to the Committees on Armed Services of the Senate and the House of Representatives a report on reforms for commercial item procurement. (b) Elements The report required under subsection (a) shall include the following elements: (1) A review of recommendations by the independent panel created under section 809 of the National Defense Authorization Act for Fiscal Year 2016 ( Public Law 114–92