The required accessibility parent (simplified as "parent") role defines the container where this role is allowed. If a role has a required accessibility parent, authors MUST ensure that an element with the role is an accessibility child of an element with the required accessibility parent role. For example, an element with role listitem is only meaningful when it is a child of an element with role list.
To determine whether an element has a parent with the required role, user agents MUST ignore any elements with the role
Also, user agents SHOULD ignore the role if it occurs outside the context of a required accessibility parent role.
An element with the appropriate implicit WAI-ARIA semantic fulfills this requirement.