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US Federal Standard

Section 508 Compliance Guide

A comprehensive guide to understanding and implementing Section 508 of the Rehabilitation Act for US federal agency accessibility compliance

Federal Requirement
Section 508 requires all federal agencies to make their electronic and information technology accessible to people with disabilities. This includes websites, software, hardware, and digital content. Non-compliance can result in legal action and loss of federal funding.

Overview

Section 508 of the Rehabilitation Act of 1973, as amended in 1998, is a federal law that requires all electronic and information technology (EIT) developed, procured, maintained, or used by federal agencies to be accessible to people with disabilities. This includes both employees and members of the public.

The law applies to all federal agencies when they develop, procure, maintain, or use electronic and information technology. This encompasses a wide range of technologies including websites, software applications, telecommunications products, video and multimedia products, desktop and portable computers, and more.

In January 2017, the U.S. Access Board published a final rule that updated Section 508 standards. These "Revised 508 Standards" incorporated by reference the Web Content Accessibility Guidelines (WCAG) 2.0 Level A and Level AA success criteria, harmonizing Section 508 with international accessibility standards and modernizing requirements for technology that has evolved significantly since the original standards were published.

Key Facts About Section 508
  • Enacted: 1998 (amended from 1973 Rehabilitation Act)
  • Last Updated: January 2017 (Revised 508 Standards)
  • Enforced By: U.S. Access Board and individual federal agencies
  • Applies To: All federal agencies and their contractors
  • Based On: WCAG 2.0 Level A and AA (since 2017)
  • Covers: Websites, software, hardware, documents, multimedia, and telecommunications

Who Must Comply

Federal Agencies

All executive branch federal agencies must comply with Section 508. This includes:

  • Cabinet-Level Departments: State, Treasury, Defense, Justice, Interior, Agriculture, Commerce, Labor, HHS, HUD, Transportation, Energy, Education, Veterans Affairs, Homeland Security
  • Independent Agencies: EPA, NASA, GSA, SSA, and dozens of others
  • Regulatory Agencies: SEC, FCC, FTC, FDIC, and others
  • Intelligence Agencies: CIA, NSA, and other intelligence community members

Legislative and judicial branches are encouraged but not required to comply with Section 508, though many have voluntarily adopted the standards.

Federal Contractors and Vendors

Any organization that provides electronic and information technology to federal agencies must ensure their products and services meet Section 508 standards. This includes:

  • Software Developers: Creating applications or systems for federal use
  • Website Developers: Building or maintaining federal websites
  • Hardware Manufacturers: Providing computers, phones, kiosks, or other devices
  • Content Creators: Developing documents, multimedia, or training materials
  • Service Providers: Offering cloud services, SaaS, or hosted applications
  • Telecommunications Companies: Providing communication systems and devices

Contractors must provide Accessibility Conformance Reports (ACRs), typically using the Voluntary Product Accessibility Template (VPAT®), documenting how their products meet Section 508 requirements.

Grant Recipients

Organizations receiving federal grants may be required to comply with Section 508 if:

  • The grant agreement specifically requires Section 508 compliance
  • They are developing technology that will be used by a federal agency
  • The grant-funded technology will be used to provide services on behalf of a federal agency
Important: Beyond Direct Requirements

While Section 508 technically applies only to federal agencies, many state and local governments have adopted similar standards. Additionally, private sector organizations increasingly adopt Section 508 standards as best practices or to prepare for potential future federal contracts. The standards have become a de facto benchmark for accessibility across many industries.

Technical Standards

WCAG 2.0 Integration

The centerpiece of the Revised 508 Standards is the incorporation of WCAG 2.0 Level A and Level AA success criteria for web content. This means that federal web content must meet all 38 Level A criteria and all 20 Level AA criteria from WCAG 2.0.

Specifically, Section 508 references:

  • 501.1 Scope: Defines what constitutes "web content"
  • 602.3 Electronic Content: Requires conformance to WCAG 2.0 Level A and AA

This integration means that all WCAG 2.0 Level A and AA requirements—covering perceivability, operability, understandability, and robustness—are now Section 508 requirements for web content.

Functional Performance Criteria

Chapter 3 of the standards establishes Functional Performance Criteria (FPC) that provide outcome-based requirements. These criteria ensure that even if specific technical standards cannot be met, the technology must still be usable by people with disabilities.

  • Without Vision: Where a visual mode of operation is provided, users who are blind must be able to use all features. This typically means providing screen reader compatibility, audio output, or tactile output.
  • With Limited Vision: Users with low vision must be able to perceive and use all features. This requires adequate color contrast, scalable text and interface elements, and support for screen magnification.
  • Without Perception of Color: Users who cannot distinguish colors (colorblind users) must be able to use all features without relying on color alone.
  • Without Hearing: Users who are deaf must have access to all audio information. This requires captions for all video content and transcripts for audio content.
  • With Limited Hearing: Users who are hard of hearing must be able to access audio. This requires volume controls with adequate amplification.
  • Without Speech: Users who cannot speak must have alternative input methods. This requires keyboard or touch-based alternatives to voice commands.
  • With Limited Manipulation: Users with limited dexterity must be able to operate controls. This requires large touch targets and adequate spacing between interactive elements.
  • With Limited Reach and Strength: Physical controls must be within reach and not require excessive force.

Procurement and Acquisition

The Federal Procurement Process

Section 508 requirements are integrated into the Federal Acquisition Regulation (FAR), making accessibility a mandatory consideration in all federal technology procurements. The procurement process typically follows these steps:

  • 1. Needs Assessment: Agencies must identify accessibility needs early in the procurement process
  • 2. Market Research: Agencies research available products and services
  • 3. Solicitation: Request for Proposals (RFPs) or other solicitations must include specific Section 508 requirements
  • 4. Evaluation: Proposals are evaluated for accessibility compliance
  • 5. Award and Implementation: Contracts must include Section 508 compliance clauses

Exceptions and Undue Burden

Section 508 allows for limited exceptions when compliance would impose an "undue burden" on the agency. However, these exceptions are narrowly construed.

Testing and Validation

Section 508 compliance requires multi-layered testing that combines automated tools, manual evaluation, and assistive technology testing. No single method catches all accessibility issues.

Common Compliance Issues

Federal agencies and contractors frequently encounter recurring accessibility issues. Understanding these common problems helps prioritize testing and remediation efforts.

Web Content Issues

  • Missing Alternative Text: Images without alt attributes, alt text that doesn't adequately describe image content or function, complex images without long descriptions
  • Keyboard Accessibility: Interactive elements not keyboard accessible, focus indicators removed or insufficient, illogical tab order
  • Color and Contrast: Text with insufficient contrast against backgrounds, color used as the only means of conveying information
  • Forms: Form fields without associated labels, error messages not programmatically associated with fields
  • Structure and Semantics: Missing or improper heading structure, tables without proper headers or markup

Document Issues

  • PDFs: Untagged PDFs, incorrect reading order, missing alternative text
  • Word Documents: Improper use of styles, images without alt text, inaccessible tables
  • PowerPoint: Missing reading order, images without alt text, insufficient contrast
  • Excel: Unlabeled data tables, charts without alternative text, complex layouts

Best Practices for Compliance

Organizational Best Practices

  • Leadership and Governance: Designate a Section 508 Program Manager with authority and resources
  • Policy and Procedures: Develop comprehensive agency Section 508 policies
  • Training and Awareness: Provide role-based accessibility training

Lifecycle Integration

  • Planning and Requirements: Include accessibility in initial requirements gathering
  • Design and Development: Use accessible frameworks and component libraries
  • Testing and Quality Assurance: Include accessibility in definition of done
  • Deployment and Maintenance: Conduct final accessibility audit before launch

Resources and Tools

Official Resources

  • U.S. Access Board: www.access-board.gov - Official Section 508 standards
  • Section508.gov: www.section508.gov - GSA's comprehensive Section 508 resource
  • DHS Trusted Tester: www.dhs.gov/trusted-tester - Free training and certification
  • W3C WCAG: www.w3.org/WAI/WCAG21/quickref/ - WCAG quick reference

Testing Tools

  • axe DevTools: Browser extension for accessibility testing
  • WAVE: WebAIM's web accessibility evaluation tool
  • Color Contrast Analyzer: Paciello Group's contrast checking tool
  • ANDI: DHS's free accessibility testing tool
  • Pa11y: Automated testing for continuous integration

Assistive Technologies

  • JAWS: Freedom Scientific's screen reader
  • NVDA: Free screen reader from NV Access
  • VoiceOver: Built-in macOS/iOS screen reader
  • TalkBack: Built-in Android screen reader
  • ZoomText: Screen magnification software
  • Dragon: Speech recognition software