Changes to this guideline:

• Minor content edits were made to improve clarity.
• Spelling and punctuation were corrected.
• Tables were formatted to be easily read by screen readers in compliance with the Americans with Disabilities Act (ADA).
• Numbered or itemized items in paragraph format were converted to vertical numbered or bulleted lists in compliance with ADA.
• Link text was changed to comply with ADA.
• Live links were updated; dead links are indicated.