A sign with the street number of a new building or development and the name of the architect, engineer, planner, landscaper, the general contractor and subcontractors, and the project title and sponsor, owner or tenant, and located on a lot during construction on the premises. Such sign shall be located at the principal entrance and within the street line and lot lines of the premises and shall be removed within seven days after the completion of the construction work. The total area of all such signs shall not exceed 12 square feet.