; and (4) an estimated timeline and budget required to support the requirements and capabilities identified in paragraphs (1) through (3). (c) Transmittal The Administrator shall transmit the results of the assessment to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate not later than 1 year after the date of enactment of this Act. 338. International confidence and capacity building for near-Earth object impact mitigation (a) In general The Administrator shall expand efforts being carried out with international entities, including the Space Missions Planning Advisory Group of the Working Group on near-Earth Objects of the Scientific and Technical Subcommittee of the United Nations Committee on the Peaceful Uses of Outer Space, to support confidence-building and capacity-building activities related to near-Earth object impact mitigation techniques, such the use of a kinetic impactor, gravity tractor, and nuclear explosive device. (b) Confidence and capacity-Building The Administrator may carry out workshops, technical exchanges of information, training, or other means, as appropriate, with international entities for building confidence, and developing technical understanding and awareness of in-space near-Earth object deflection or impact mitigation techniques. (c) Briefing Not later than 9 months after the date of enactment of this Act, the Administrator shall provide a briefing to staff of the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate on plans for carrying out the activities in subsections (a) and (b). 339. Close passing near-Earth objects The Administration should consider planning preparatory actions to take advantage of opportunities related to close passing near-Earth objects for both scientific and public outreach purposes, including the close approach of asteroid 99942 Apophis anticipated to occur in