Section 508 applies to the Federal government but there may be implications for employees and others at the State level. For additional information on States Section 508 requirements, please see NIDRR.
Many states have also passed legislation requiring electronic and information technology accessibility. Additional information on individual states that have passed accessibility legislation are available at http://www.ittatc.org/laws/state_intro.cfm.
There are a number of resources and links that may help you to ensure accessibility.