29 C.F.R. § 1915.155 Head protection.
Title 29 - Labor
(a) Use. (1) The employer shall ensure that each affected employee wears a protective helmet when working in areas where there is a potential for injury to the head from falling objects. (2) The employer shall ensure that each affected employee wears a protective helmet designed to reduce electrical shock hazards where there is potential for electric shock or burns due to contact with exposed electrical conductors which could contact the head. (b) Criteria for protective helmets. (1) Protective helmets purchased after August 22, 1996, shall comply with ANSI Z89.l–1986, “Personnel Protection—Protective Headwear for Industrial Workers-Requirements,” which is incorporated by reference, as specified in §1915.5, or shall be demonstrated by the employer to be equally effective. (2) Protective helmets purchased before August 22, 1996, shall comply with the “American National Standard Safety Requirements for Industrial Head Protection, Z89.1–1969,” which is incorporated by reference as specified in 1915.5, or shall be demonstrated by the employer to be equally effective.
Title 29: Labor
PART 1915—OCCUPATIONAL SAFETY AND HEALTH STANDARDS FOR SHIPYARD EMPLOYMENT
Subpart I—Personal Protective Equipment (PPE)
§ 1915.155 Head protection.

