; (B) in paragraph (2), by striking and after the semicolon; (C) in paragraph (3), by striking the period and inserting ; and ; and (D) by adding at the end the following: (4) to assist such State in developing and implementing any certification program for coal or other mines required for compliance with section 118. ; and (2) in subsection (h), by striking $3,000,000 for fiscal year 1970, and $10,000,000 annually in each succeeding fiscal year and inserting $20,000,000 for each fiscal year . 603. Double encumbrance; succession plan (a) Authorization Notwithstanding any personnel procedures, rules, or guidance, the Secretary of Labor is authorized to double encumber a position or utilize early replacement hiring for authorized representatives and technical specialist positions in the Mine Safety and Health Administration. The number of such positions shall be consistent with the staffing requirements set forth in the succession plan under subsection (b). (b) Succession Plan (1) In general Not later than 90 days after the date of enactment of this Act, the Secretary of Labor shall develop and provide to Congress a succession plan for the Mine Safety and Health Administration for the next 5 years to assure timely replacement of qualified employees critical to maintaining the agency’s mission. (2) Contents of plan The succession plan developed under this subsection shall— (A) estimate employee turnover for each year; (B) set benchmarks for maximum allowable percentage of vacancies, and a maximum ratio of trainees to authorized representatives; (C) utilize double encumbrance or early replacement hiring for authorized representatives and technical specialists; (D) implement tracking systems to assure that staffing levels of authorized representatives and technical specialists do not fall below the minimum required to conduct necessary inspections, thoroughly review mine plans, and conduct accident and special investigations