Notwithstanding any other provision of this Subtitle, when multiple
buildings have frontage within one or more assigned fifty-foot frontage
areas and under the remaining provisions of this Subtitle each such
building would be assigned a separate number designation but, due
to a limited number of frontage, sufficient numbers are not available,
then all such buildings at that location will be assigned the same
number and each such building will carry a letter designation such
as A, B or C in addition to the assigned number.