If...
a) the crew is trained and authorised to perform Cat IIIb approaches with NO DH
b) the a/c is cat IIIb NO DH capable
c) Everything is working as it's supposed to, no MEL items, no ground facilities
and if...
The country or the airport, for one or the other stupid reason will only allow Cat 25 ft DH.
The F/O is looking at the instruments only...
I'm pretty sure that I WILL see enough to call "continue" at 25ft RA...
There's a difference between minima that are there for terrain or technical reasons and minima that are there for bureaucratic reasons.