; and (F) research and development should be undertaken to modify the CPDM to provide real time data on exposure to respirable quartz. (2) Completion deadline Not later than August 1, 2022, the Secretary shall transmit a report of the study required under paragraph (1) to the Committee on Health, Education, Labor, and Pensions of the Senate and the Committee on Education and the Workforce of the House of Representatives. (3) Subsequent studies By August 1, 2025, and every 3 years thereafter, the Secretary shall conduct a new study as described in paragraph (1) and report, by not later than one year after the commencement of the study, the findings of such study to the Committee on Health, Education, Labor, and Pensions of the Senate and the Committee on Education and the Workforce of the House of Representatives. (4) Revised standards If any report of the Secretary under this subsection concludes that the applicable standard for respirable dust concentration should be lowered to protect the health of miners, or that the incidence of pneumoconiosis among coal miners in the United States, as reported by the National Institute for Occupational Safety and Health, has not been reduced from such incidence prior to the implementation of the most recent applicable standard for respirable dust concentration, the Secretary shall, consistent with the requirements of this section and section 101, accordingly revise such standard and any applicable sampling or testing procedures not later than 24 months after the publication of such report of the Secretary under this subsection. . 505. Refresher training on miners’ rights and responsibilities (a) In general Section 115(a)(3) ( 30 U.S.C. 825(a)(3) ) is amended to read as follows: (3) all miners shall receive not less than 9 hours of refresher training not less frequently than once every 12 months, and such training shall include one hour of training on the statutory rights and responsibilities of miners and their representatives under this Act and other applicable Federal and