Tactile map. In 1998, the federal government adopted an amendment to the Rehabilitation Act requiring federal agencies to make their information and electronic communications technology accessible to people with disabilities. The amendment, called Section 508 (29 U.S.C. § 794d), requires that agencies "give disabled employees and members of the public access to technology that is comparable to the access available to others."
The law applies to all federal agencies when they develop, procure, maintain, or use electronic and information technology. While this standard is not currently a mandate for state or local governments, the City and County of Denver has adopted the Section 508 guidelines as defined for Internet and Intranet content and applications.
Section 508 Guidelines (1194.22 Standards)
(a) A text equivalent for every non-text element
shall be provided (e.g., via "alt", "longdesc", or in
element content).
(b) Equivalent alternatives for any multimedia
presentation shall be synchronized with the
presentation.
(c) Web pages shall be designed so that all
information conveyed with color is also available
without color, for example from context or
markup.
(d) Documents shall be organized so they are
readable without requiring an associated style
sheet.
(e) Redundant text links shall be provided for
each active region of a server-side image map.
(f) Client-side image maps shall be provided
instead of server-side image maps except where the
regions cannot be defined with an available geometric
shape.
(g) Row and column headers shall be identified
for data tables.
(h) Markup shall be used to associate data cells
and header cells for data tables that have two or
more logical levels of row or column headers.
(i) Frames shall be titled with text that
facilitates frame identification and navigation.
(j) Pages shall be designed to avoid causing the
screen to flicker with a frequency greater than 2 Hz
and lower than 55 Hz.
(k) A text-only page, with equivalent information
or functionality, shall be provided to make a Web
site comply with the provisions of this part, when
compliance cannot be accomplished in any other way.
The content of the text-only page shall be updated
whenever the primary page changes.
(l) When pages utilize scripting languages to
display content, or to create interface elements, the
information provided by the script shall be
identified with functional text that can be read by
assistive technology.
(m) When a Web page requires that an applet,
plug-in or other application be present on the client
system to interpret page content, the page must
provide a link to a plug-in or applet that complies
with
§1194.21(a) through (l).
(n) When electronic forms are designed to be
completed on-line, the form shall allow people using
assistive technology to access the information, field
elements, and functionality required for completion
and submission of the form, including all directions
and cues.
(o) A method shall be provided that permits users
to skip repetitive navigation links.
(p) When a timed response is required, the user
shall be alerted and given sufficient time to
indicate more time is required.