(A) In enacting an ordinance, it is presumed that:
(1) Compliance with the constitutions of the 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)