Plain Language Recommendations
If a page or application has a time limit, the user must be given options to turn off, adjust (up to 10x), or extend that time limit (up to 10x).This is not a requirement for real-time events (e.g., an auction), where the time limit is absolutely required, or if the time limit is longer than 20 hours.
WCAG 2.0 Recommendations
Guideline 2.2: Enough Time
Provide users enough time to read and use content.