<< By way of explanation, if I do not populate the break4 column, is there a way to suppress the headers and footers for this break? >>
While you can't address the visibility of the band directly (as far as I know) since it has no component ID, you can place all the fields in the header and footer band into a region and then hide the region. If the band containing the region is set to Dynamic height, the band will effectively disappear. -- Larry
