To be compliant with Level AA of the Web Content Accessibility Guidelines (WCAG), headings and labels need to describe the topic or purpose, therefore, pages should use intuitively named subheads.

Section Headings    

Section headings should be used to organize the content, therefore, subhead1, subhead2, and bolding in a hierarchical manner to be compliant with WCAG Level AAA.

Resources 

• WCAG Guideline 2.4.6 – Headings & Labels
• WCAG Guidelines 2.4.10 – Section Headings
• Subheads Best Practices