No construction permit shall be issued for any detached dwelling unit within an age-restricted housing development if it is substantially similar in exterior design with any neighboring dwelling unit situated on another lot on the same street, either on the same side of the street or on the opposite side of the street, unless the two lots are separated by a distance of at least 50 feet.

Detached dwelling units shall be considered "substantially similar in exterior design" if they have any one of the following three architectural characteristics:

(Reserved)

The requirements of this subsection shall not be considered satisfied where minor changes or deviations to architectural plans and/or lot location surveys are made for the primary purpose of circumventing the requirements of this subsection.

The different designs proposed by an applicant shall be identified by the applicant as to model and elevation and shall be reviewed and approved by the Planning Board at the time of final subdivision approval.

In order to insure conformity with the requirements of this subsection and the final subdivision approval by the board, at the time application is made for each construction permit for each detached dwelling unit, the developer shall provide a map of the approved final subdivision to the construction official with a clear indication of the model and elevation of each dwelling unit for which a construction permit has been issued, or is requested to be issued.