In the B-1 Central Business Zone only, the construction, alteration of, or addition to any premises which creates no variances other than the need for an increase of five or fewer vehicle parking spaces. This shall be a one-time exemption stemming from the parking requirement in effect for the premises as of the date of the passage of this Subsection B or as set forth at the time of a previous site plan approval. Additionally, if the one-time exemption is deemed to apply, the applicant shall not be required to obtain parking variance relief.