The enactment of this chapter shall not terminate or otherwise affect rights, variances and permits acquired or authorized under the provisions of any section hereby revised or repealed. Where a building permit has been issued for the construction of a building or structure, and for an authorized use and occupancy thereof, in accordance with the law prior to the effective date of this revised chapter, said building or structure may be in conformance with the approved plans and on the basis for which they said building permit was issued, provided construction of said building or structure is commenced within sixty (60) days of the effective date of the building permit and diligently pursued to completion. Detailed conditional use applications based upon concept plans approved prior to the effective date of this revised ordinance shall be subject to the terms and conditions of this revised chapter. Upon showing an undue hardship, an applicant may be allowed by the City Council to process such detailed conditional use application under the terms and conditions of the previous chapter. (Ord. 232, 4-14-2010)