A very common requirement however it can lead to some bizarre situations. Captains at my current airline have this restriction however are fully LVO qualified with no restrictions for such approaches. Sometime back while acting as relief on a four-man crew, 2 CNs and 2 FOs, the operating CN on his first ever sector in command, while exiting the hold, was faced with unforecast deteriorating weather on the approach however CAT I was still in force. ATC were not prepared to go to CAT II as it would reduce their traffic flow.