; (2) any agency plan to expand telework policies, practices, or levels beyond the telework policies, practices, and levels of the agency that were in effect on December 31, 2019; and (3) a certification by the Director that the agency plan described in paragraph (2) will— (A) have a substantial positive effect on— (i) the performance of the mission of the agency, including the performance of customer service; (ii) increasing the level of dispersal of agency personnel throughout the United States; and (iii) the reversal of any adverse impacts described in paragraph (1)(A); (B) substantially lower the costs of the agency relating to owning, leasing, or maintaining real property; (C) substantially lower the costs of the agency attributable to paying locality pay to agency personnel working from locations outside the pay locality of their position’s official worksite; and (D) ensure that teleworking employees will be provided with secure network capacity, communications tools, necessary and secure access to appropriate agency data assets and Federal records, and equipment sufficient to enable each teleworking employee to be fully productive, without substantially increasing the agency’s overall costs for secure network capacity, communications tools, and equipment. (b) Limitation (1) In general The head of an agency may not implement an agency plan described in subsection (a)(2) for which the Director does not issue a certification described in subsection (a)(3). (2) Subsequent plans If the head of an agency unsuccessfully submits an agency plan described in subsection (a)(2) to the Director for the certification described in subsection (a)(3), the head of the agency may— (A) submit to the Director subsequent agency plans until the head of the agency receives the certification; and (B) submit a subsequent agency plan described in subparagraph (A) that is certified by the Director to Congress.