Regulations.Gov (federal regulations)
http://www.regulations.gov

Federal Register
http://www.gpoaccess.gov/fr/index.html

Code of Federal Regulations (CFR)
http://www.gpoaccess.gov/cfr/index.html

OSHA Regulations and Standards
http://www.osha.gov/pls/oshaweb/owasrch.
search_form?p_doc_type=STANDARDS
& p_toc_level=0

EPA Laws and Regulations
http://www.epa.gov/epahome/rules.html

South Carolina Code of Regulations
http://www.scstatehouse.net/coderegs/
statmast.htm

FindLaw - State Resources
http://www.findlaw.com/11stategov/

See also Standards & Specifications