On first read, total confusion. Second time around I think it is just 'arse-covering' by ICAO in saying that if when you get to DA/DH you cannot see the required visual cues then you cannot continue to land because the "limits of the operating minima specified for that aerodrome" (ie t/down lights/approach lights/runway itself, whatever is appropriate for the CAT) have not been met? I assume this since it follows "the approach may be continued to DA/H or MDA/H."
Indeed a strange way of putting it!