A. It is the intent of the Legislature to provide a free public kindergarten for every five-year-old child in this state. B. Each day during which a child attends a kindergarten for two and one-half (2 1/2) hours or more shall be counted as one hundred percent (100%) of one (1) day of average daily attendance. Each day a kindergarten student is on the membership roll in a school district shall be counted as one hundred percent (100%) of one (1) day of average daily membership. C. It shall be the duty of every school district in this state to provide and offer kindergarten free of tuition for every child residing in such district who attains the age of five (5) years on or before the first day of September during the school year such kindergarten is offered, provided that this duty may be satisfied by transferring kindergarten children to other school districts which accept them and provide kindergarten for such children, or by contracting for classroom space with a licensed public or licensed private child care provider based upon selection criteria established by the district. D. A kindergarten program may be offered jointly by school districts that have formed interlocal cooperative agreements pursuant to Section 5-117b of this title. E. Upon implementation of this subsection as provided for in subsection G of this section, it shall be the duty of every school district in this state to provide and offer a full six-hour day of kindergarten free of tuition for every child residing in such district who attains the age of five (5) years on or before the first day of September during the school year such kindergarten is offered, provided that this duty may be satisfied by transferring kindergarten children to other school districts which will accept them and can provide kindergarten for such children, or by contracting for classroom space with a licensed public or licensed private child care provider based upon selection criteria established by the district. The requirement to offer a full six-hour day of kindergarten as provided for in this subsection shall not become effective until three (3) years after the provisions of this subsection are implemented as provided for in subsection G of this section. F. Upon implementation of this subsection as provided for in subsection G of this section, the requirement to attend kindergarten provided in Section 10-105 of this title may be satisfied by attendance in either a half-day or full-day program. Membership in a kindergarten for either two and one-half (2 1/2) hours or six (6) hours per school day shall be counted as one (1) day for average daily membership purposes. For purposes of State Aid, the pupil grade level weight for a two-and-one-half-hour day of kindergarten shall be 1.3, and for a six-hour full day of kindergarten shall be 1.5. G. Implementation of subsections E and F of this section shall be delayed until the current expenditure per pupil in average daily attendance in public elementary and secondary schools in unadjusted dollars for the 1998-99 school year or any school year thereafter for Oklahoma, as reported by the National Center for Education Statistics annually in the Digest of Education Statistics, reaches at least ninety percent (90%) of the regional average expenditure for that same year, and funds are provided. For purposes of this subsection, the regional average expenditure shall consist of the current expenditure per pupil in average daily attendance in public elementary and secondary schools in unadjusted dollars for each of the following states: Arkansas, Colorado, Kansas, Missouri, New Mexico, Oklahoma, and Texas, averaged together. By January 1 of each year, the State Board of Education shall report whether or not the ninety-percent expenditure level has been reached based on information reported annually in the Digest of Education Statistics by the National Center for Education Statistics. Subsections E and F of this section shall be implemented on July 1 after the first January 1 report verifies that the ninety-percent expenditure level has been reached and funds have been provided for the specific purposes of this section.