Foes of a law that mandates schools teach about the historical contributions of gay, lesbian, bisexual and transgender people have announced a second attempt to repeal the law, the San Francisco Chronicle reported.

Starting as early as the 2013-14 school year, Senate Bill 48 (SB48) or the FAIR Education Act, sponsored by state Senator Mark Leno, a Democrat from San Francisco, requires the California Board of Education and local school districts to include the curriculum in their lesson plans.

Two initiatives filed on Wednesday seek to undo the law's gay history mandate. One would carve out the inclusion of LGBT people in the law, leaving a mandate for instruction about people with disabilities standing. The second would allow parents to opt out of curriculum that conflicts “with the religious training and beliefs of a parent or guardian.”

Both proposals were submitted by Richard Rios, the California chairman of the Christian Coalition, on behalf of the Committee to Repeal SB48 and the Committee for Parental Rights for Education.

Opponents of the law failed in their initial attempt to repeal the law. The group Stop SB 48 failed to collect the signatures of 504,760 registered voters in time to qualify for the next statewide ballot.