Section 28-101.4.1. Permit issued or work commenced prior to effective date

If a permit for work was issued prior to the effective date of this code
  or, if no permit  was  necessary,  work  was  commenced  prior  to  such
  effective  date,  all  of the provisions of chapter 1 of title 27 of the
  administrative code as heretofore in effect shall apply to such work.