The following are links to the "Understanding WCAG 2.0" documentation regarding the success criteria for each area in Level A and Level AA. Documents open in a new tab/window. 

As outlined in the Information and Communications Standards (see sections 9 – 19) part of Ontario Regulation 191/11 under the AODA, your public website and web content posted after January 1, 2012, must meet the WCAG 2.0 Level AA success criteria. (source)

Please note: the documentation for WCAG 2.0 is no longer maintained and has been updated to WCAG 2.2. Links to the WCAG 2.2 documentation are available from the links below. I have kept this documentation focused on WCAG 2.0 as this is what we are bound to by Ontario law — in most cases, we are also in line with WCAG 2.2

Level A

Guideline 1.1: Provide text alternatives for non-text content

• Success Criterion 1.1.1 Non-text content

Guideline 1.2: Provide alternatives for time-based media

• Success Criterion 1.2.1 Audio-only and video-only (Prerecorded)
• Success Criterion 1.2.2 Captions (Prerecorded)
• Success Criterion 1.2.3 Audio Description or Media Alternative (Prerecorded) 

Guideline 1.3: Adaptable content

• Success Criterion 1.3.1 Info and relationships
• Success Criterion 1.3.2 Meaningful sequence
• Success Criterion 1.3.3 Sensory characteristics 

Guideline 1.4: Distinguishable content

• Success Criterion 1.4.1 Use of color
• Success Criterion 1.4.2 Audio control

Guideline 2.1: Keyboard accessible

• Success Criterion 2.1.1 Keyboard
• Success Criterion 2.1.2 No keyboard trap

Guideline 2.2: Provide users enough time to read and use content

• Success Criterion 2.2.1 Timing adjustable
• Success Criterion 2.2.2 Pause, stop, hide 

Guideline 2.3: Don’t design content in a way that is known to cause seizures

• Success Criterion 2.3.1 Three flashes or below threshold

Guideline 2.4: Navigable content

• Success Criterion 2.4.1 Bypass blocks
• Success Criterion 2.4.2 Page titled
• Success Criterion 2.4.3 Focus order
• Success Criterion 2.4.4 Link purpose (in context)

Guideline 3.1: Readable text content

• Success Criterion 3.1.1 Language of page

Guideline 3.2: Predictable web pages

• Success Criterion 3.2.1 On focus
• Success Criterion 3.2.2 On input

Guideline 3.3: Input assistance 

• Success Criterion 3.3.1 Error identification
• Success Criterion 3.3.2 Labels or instructions

Guideline 4.1: Compatible

• Success Criterion 4.1.1 Parsing
• Success Criterion 4.1.2 Name, role, value

Level AA

Guideline 1.4: Distinguishable content

• Success Criterion 1.4.3 Contrast (Minimum)
• Success Criterion 1.4.4 Resize text
• Success Criterion 1.4.5 Images of text 

Guideline 2.4: Navigable content

• Success Criterion 2.4.5 Multiple ways
• Success Criterion 2.4.6 Headings and labels
• Success Criterion 2.4.7 Focus visible 

Guideline 3.1: Readable text content

• Success Criterion 3.1.2 Language of parts 

Guideline 3.2: Predictable web pages

• Success Criterion 3.2.4 Consistent identification 

Guideline 3.3: Input assistance 

• Success Criterion 3.3.3 Error suggestion
• Success Criterion 3.3.4 Error prevention (Legal, financial, data)