For required form controls, indicate the required status in the control's <label> or <legend>. If not indicated by text (like "(required)"), then make sure the meaning of the indicator is explained before it is used. NOTE: Abbreviating "required" to "req." may be confusing. Visit https://www.w3.org/TR/WCAG20-TECHS/H90 for more information.
Provide a semantic grouping for related form controls using the <fieldset> and <legend> elements. This is most important for related radio buttons and checkboxes. If desired, CSS can be used to change the visual effect of using the elements. Visit https://www.w3.org/TR/WCAG20-TECHS/H71 for more information.
⯈ Help: <legend> element