; (B) one or 2 days per pay period; (C) once per month; and (D) on an occasional, episodic, or short-term basis; and (7) include methods for collecting data on, setting goals for, and reporting costs savings to the executive agency achieved through teleworking, consistent with the guidance developed under section 150004(c) of the Take Responsibility for Workers and Families Act. ; and (B) by adding at the end the following: (d) Notification for reduction in teleworking participation Not later than 30 days before the date that an executive agency implements or modifies a teleworking plan that would reduce the percentage of employees at the agency who telework, the head of the executive agency shall provide written notification, including a justification for the reduction in telework participation and a description of how the agency will pay for any increased costs resulting from that reduction, to— (1) the Director of the Office of Personnel Management; (2) the Committee on Oversight and Reform of the House of Representatives; and (3) the Committee on Homeland Security and Governmental Affairs of the Senate. (e) Prohibition on agency-Wide limits on teleworking An agency may not prohibit any delineated period of teleworking participation for all employees of the agency, including the periods described in subparagraphs (A) through (D) of subsection (b)(6). The agency shall make any teleworking determination with respect to an employee or group of employees at the agency on a case-by-case basis. . (2) In section 6506(b)(2)— (A) in subparagraph (F)(vi), by striking and at the end; (B) in subparagraph (G), by striking the period at the end and inserting a semicolon; and (C) by adding at the end the following: (H) agency cost savings achieved through teleworking, consistent with the guidance developed under section 2(c) of the Telework Metrics and Cost Savings Act