Perhaps rather than cut/paste a quite, you should go to the document.
The ref you make is an explanation of the terminology where MDH as a DH is used. (note
introduced)This was to harmonize with the FAA and now DA is DH....
However, this is the MDH and DH, which is in the process of being transitioned to. This MDH/DH is a DA, but it is NOT the MDA.
The DA or DH take into account the momentary descent for the CAT aircraft, MDA does not.
page 254/57
SUBPART E
ALL WEATHER OPERATIONS
OPS 1.430
Aerodrome operating minima — General
note in the minima Tables...
Note 7: The MDH mentioned in Table 4a, 4b, 4c and 4d refers to the initial calculation of MDH. When selecting the associated RVR, there is no need to take account of a rounding up to the nearest ten feet, which may be done for operational purposes, e.g. conversion to MDA.
http://eur-lex.europa.eu/LexUriServ/...01:0238:EN:PDF