(A) Any building permit issued prior to the effective date of this chapter shall expire within one year following the effective date of this chapter.
(B) Any building permit issued under this chapter for building of a residence shall expire one year (365 days) from the date of issue. Any building permit issued under this chapter for the purpose of constructing any commercial building shall expire two years (730 days) from the date of issuance. No building shall be done under authority of any expired building permit. If the improvement is not completed on the expiration date, a further application for a building permit to complete such structure may be made under the same procedure set forth herein for obtaining the original building permit.