No open space provided around any principal building for the purpose of complying with front, side or rear yard provisions, shall be considered as providing the yard provisions of another principal building. On a lot which extends through a block in a manner resulting in frontage on two or more streets, including corner lots, front yard requirements shall be complied with on all street frontages.

No front yard shall be used for open storage of boats, vehicles or any other equipment, except for parking on driveways in a residential zone, for the parking of passenger vehicles.