All regulations applicable to a district designation shall be applicable to such district designation appended with a suffix, except as otherwise set forth in express provisions of this Resolution. If a section lists an R4 District, therefore, the provisions of that section shall also apply to R4-1, R4A and R4B Districts, unless separate provisions for the districts with suffixes are listed within such section. Wherever a section lists only a district with a suffix, the provisions applicable to such district are different from the provisions of that district without a suffix. If a section lists only a C4-6A District, therefore, the provisions of that section are not applicable to a C4-6 District.