At the time of completion, the person performing inspections, tests, and maintenance of shafts and hoisting equipment required in standard 57.19120 shall certify, by signature and date, that they have been done. A record of any part that is not functioning properly shall be made and dated. Certifications and records shall be retained for one year.
30 C.F.R. §57.19121
Sec. 101 , Pub. L. 91-173 as amended by Pub. L. 95-164 , 91 Stat. 1291 (30 U.S.C. 811 )