The yard regulations of this Section apply to any development or enlargement.

For zoning lots, or portions thereof, located within 100 feet of the street line of a wide street, no rear yard shall be required.

For all zoning lots, or portions thereof, located more than 100 feet from the street line of a wide street, a rear yard having a minimum depth of 30 feet shall be required.

On a through lot, or portion thereof, more than 100 feet from the street line of a wide street, the rear yard equivalent provisions of Section 23-532, paragraph (a), shall apply.