; and (B) submit to Congress recommendations concerning energy performance requirements for fiscal years 2028 through 2037. (b) Energy management requirement for Federal agencies (1) In general Each agency shall— (A) not later than October 1, 2019, begin installing in Federal buildings owned by the United States all energy and water conservation measures determined by the Secretary to be life-cycle cost-effective; and (B) complete the installation described in subparagraph (A) as soon as practicable after the date referred to in that subparagraph. (2) Explanation of noncompliance (A) In general If an agency fails to comply with paragraph (1), the agency shall submit to the Secretary, using guidelines developed by the Secretary, an explanation of the reasons for the failure. (B) Report to Congress Not later than October 1, 2021, and every 2 years thereafter, the Secretary shall submit to Congress a report describing any noncompliance with the requirements of paragraph (1). ; and (2) in subsection (f)— (A) in paragraph (1)— (i) by redesignating subparagraphs (E), (F), and (G) as subparagraphs (F), (G), and (H), respectively; and (ii) by inserting after subparagraph (D) the following: (E) Ongoing commissioning The term ongoing commissioning means an ongoing process of commissioning using monitored data, the primary goal of which is to ensure continuous optimum performance of a facility, in accordance with design or operating needs, over the useful life of the facility, while meeting facility occupancy requirements. ; (B) in paragraph (2), by adding at the end the following: (C) Energy management system An energy manager designated for a facility under subparagraph (A) shall take into consideration— (i) the use of a system to manage energy use at the facility; and (ii) the applicability of certification of the facility in accordance with the International Organization for Standardization standard numbered 50001 and entitled Energy Management Systems .