The National Electric Safety Code (NESC) is the standard used by electric utilities to implement safety procedures for utility workers. NESC is also the standard OSHA uses when enforcing electrical utility safety. The latest revision, NESC 2007, includes flame-resistant clothing as a requirement. Similar to NFPA70E, the NESC standard requires utilities to perform a risk assessment and then to require workers to wear flame-resistant clothing with an effective rating equal to the risk. NESC is effective starting January, 2009.