§ 10.18  DETERMINATION OF LEGISLATIVE INTENT.
   (A)   In enacting an ordinance, it is presumed that:
      (1)   Compliance with the Constitutions of this state and of the United States is intended;
      (2)   The entire ordinance is intended to be effective;
      (3)   A just and reasonable result is intended; and
      (4)   A result feasible of execution is intended.
(R.C. § 1.47)
   (B)   An ordinance is presumed to be prospective in its operation unless expressly made retrospective.
(R.C. § 1.48)
   (C)   If an ordinance is ambiguous, the court, in determining the intention of the Legislative Authority, may consider among other matters:
      (1)   The object sought to be attained;
      (2)   The circumstances under which the ordinance was enacted;
      (3)   The legislative history;
      (4)   The common law or former legislative provisions, including laws upon the same or similar subjects;
      (5)   The consequences of a particular construction; and
      (6)   The administrative construction of the ordinance.
(R.C. § 1.49)