EBR25 - KOKSIJDE CLIMB-OUT

Lateral limits	Vertical limits	Type of restriction / nature of hazard	Time of activity
504235N 0025545E - 510045N 0023852E - 505900N 0024917E - 504626N 0030102E - along the Belgian-French border - 504235N 0025545E.	4500 ft AMSL / 1100 ft AMSL (1)	Climb-out sector for jet aircraft. Crossing clearance shall be requested from Koksijde APP.	During EBFNOPR HR (2)
(1) 1100 ft AMSL from lateral limits of Koksijde CTR to 16 NM from the ARP on an axis of 150 DEG GEO, then a slope of 5°30' to the extreme limit of this sector.
(2) EBFN OPR HR can be checked with Brussels FIC or Semmerzake ATCC.

As you can see from this AIP text note, the EB-R25 airspace has a sloping lower limit. Is there a way this can be represented in SD? Following the SD chart, flying between EBKT and LFQT for example, you would be flying much lower than needed if you want to avoid R25.