I see. If you want to hide an entire side-by-side row you must actually address the row by the ID like this in the “Hidden headings or elements” option of the rule:
sbs_OuterTR_1
The number “1” represents the “side-by-side index” from the tabs.
Please note that if you hide the “side-by-side row” like this, you do not have to individually hide the fields in the “side-by-side row”.
This is as far as I remember not documented – sorry about that.
Hope this helps,
Alexander