#	Letters of Interpretation
1	05/09/2011 - 1926.100(a) - Clarification on when hard hats can be worn with bill facing to the rear.
2	11/17/2004 - 1926.100(a) - Determining the need for hard hat and eye protection on construction sites.
3	02/20/2004 - 1926.100(a) - Hard hats are not required where there is no exposure to head injuries.
4	04/17/2002 - 1926.100(a) - Hard hat testing and certification requirements when the hard hat bill is worn to the rear.
5	05/16/2001 - 1926.100(a) - Exemption from the requirement to wear hard hats for religious reasons.
6	12/02/1991 - 1926.100(a) - Use of protective helmets in construction

#	Regulations
1	03/14/2001 - - Head protection.