authority: Secs. 4, 6, 8, Occupational Safety and Health Act of 1970 (29 U.S.C. 653,655,657; secs. 1, 4, Walsh-Healey Public Contracts Act (41 U.S.C. 35,38; secs. 2, 4, Service Contracts Act of 1965 (41 U.S.C. 351,353; sec. 107, Contract Work Hours and Safety Standards Act (Construction Safety Act) (40 U.S.C. 333); sec. 41, Longshoremen's and Harbor Workers' Compensation Act (33 U.S.C. 941); sec. 5(j)(2), National Foundation on Arts and Humanities Act (20 U.S.C. 954(j)(2)); 5 U.S.C. 553; Secretary of Labor's Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), or 9-83 (48 FR 35736), as applicable. Sections 1911.12 and 1911.18 also issued under 29 CFR part 1911