That is the U.S. federal law, which also applies to all states. However some states havechosen to pass laws more favorable to people with disabilities. Oregon, for example, specifies that laws against discrimination toward people with disabilities apply to employers with six or more employees. Check the laws in your state to ensure compliance. If an employee with a disability covered under the ADA, or a related state law, needs to access the firm's intranet or internet as an essential function of their job, the employee is entitled to request a reasonable accommodation.
Equal access means more than just accessibility.
It means giving the person communication that is as effective as that provided to others. Generally, if you follow the W3 Accessibility guidelines , you should be okay. However, there are some differences, so, to be sure, review the Section 508 Electronic and Information Technology Final Standards . Test your site using a website validator like Bobby which tests your site against the W3 accessibility guidelines. Bobby will indicate areas where your website needs work, but it isn't a sufficient test of compliance.