Meaningful Sequence
(A)
When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined.
Relevance and applicability
General implementation

9.1.3.1g No structure markup for layout tables
If you manually create a new, blank page, the "Use table layout" checkbox is activated by default.
You should deactivate the checkbox so that the table layout is not used. You can then insert the "Grid" element to make the page responsive.
When you create a new page with the page wizard, the "Use table layout" checkbox is not activated by default. Instead, a responsive grid layout is automatically used.