Okla. Stat. tit. 11, § 11-15-103

A. The form of the petition for either initiative or referendum

in a municipality shall be substantially as provided in Sections 1

and 2 of Title 34 of the Oklahoma Statutes. A true copy of each

measure proposed by initiative and referendum shall be filed with

the clerk of the municipality before it is circulated and signed by

the registered voters.

B. Every petition for either the initiative or referendum shall

be signed by a number of the registered voters residing in the

municipality equal to at least twenty-five percent (25%) of the

total number of votes cast at the most recent preceding general

municipal election or biennial town meeting if the municipality is

subject to the Oklahoma Town Meeting Act. The signatures to each

petition shall be verified in the manner provided by law.

C. Signed copies of an initiative petition shall be submitted

to the clerk within ninety (90) days after the initial filing of the

measure with the clerk. Signed copies of a petition invoking a

referendum upon any ordinance or resolution shall be submitted to

the clerk within sixty (60) days after the passage of the ordinance

or resolution. Amendments to municipal charters may be proposed by

an initiative petition, and signed copies of such petition shall be

submitted to the clerk not less than sixty (60) days before the

election at which the amendments are to be voted upon.

D. For the purposes of this section, "total number of votes

cast" shall mean the sum of the votes cast for all candidates in the

race for the highest-ranking at-large municipal office appearing on

a ballot. If no such office appeared on a ballot, then "total

number of votes cast" shall be determined by using the sum of votes

cast for or against the municipal question or proposition receiving

the largest total number of votes on a ballot, provided that all

voters registered and residing within the municipal limits were

eligible to vote on such question or proposition.