ONTARIO, Calif. -- A 14-year-old student was expelled from a Christian school because her parents are lesbians, the school's superintendent said in a letter.

Shay Clark was expelled from Ontario Christian School on Thursday.

"Your family does not meet the policies of admission," Superintendent Leonard Stob wrote to Tina Clark, the girl's biological mother.

Stob wrote that school policy requires that at least one parent may not engage in practices "immoral or inconsistent with a positive Christian life style, such as cohabitating without marriage or in a homosexual relationship," The Los Angeles Times reported in Friday's edition.

Stob could not be reached for comment by the newspaper. Shay and her parents said they won't fight the ruling.

School administrators learned of the parents' relationship this week after Shay was reprimanded for talking to the crowd during a football game, Tina Clark said.

Clark and her partner have been together 22 years and have two other daughters, ages 9 and 19.

Statement From School Superintendent

The school's superintendent, Len Stob, released the following statement:

Thank you for your inquiry regarding a student that had been enrolled at Ontario Christian School. The student is not attending Ontario Christian, as the family does not meet admissions criteria. The ministry of Ontario Christian is to promote discipleship of Jesus Christ as defined by the Bible and consistent with historical Christianity. The school forms a voluntary partnership with parents who seek the same discipleship. Therefore, the school requires that at least one parent be a confessing Christian and active in the local Christian church. In this case, the parent does not meet the criteria by participating in a homosexual relationship. We regret that this relationship was not disclosed at the time of admission, as that information would have prevented enrollment and the occasion for misunderstanding.

The mission of Ontario Christian school is to provide for the children of Christian parents a Biblically-based, quality education that nurtures students to grow in knowledge, conviction and maturity; therefore, our focus is to equip students with the vision and skills to engage all relationships and culture under the authority of Jesus Christ.