A. 
Any building permit heretofore issued pursuant to any ordinance which provides for the erection of a building or structure in conformity to any preexisting ordinance shall continue in full force and effect, provided that the holder thereof has substantially undertaken construction of any such building or structure.
B. 
Pending applications or appeals for development filed prior to the effective date of this chapter may be continued but such appeals or applications shall be governed by the provisions of this chapter.