No building permits shall hereafter be granted for the erection of townhouses in the T-3 and T-6 Residence Districts unless provisions have been made for the construction of one garage for each dwelling unit. A garage for each dwelling unit shall be connected by a driveway to the adjacent street and its size shall be limited to not more than three motor vehicles. Garages required herein shall be either a part of the building or attached thereto.

Only one commercial vehicle owned and used by a resident of the premises shall be permitted to be regularly garaged in this zone, provided such commercial vehicle does not exceed a rated capacity of 1 1/2 tons and that the same shall be regularly garaged.

No garage existing in this zone or hereafter constructed in this zone as part of the building or attached thereto may be removed or converted to a different use.