On a finding by the juvenile court or probation department that a child's parents or guardians have made a reasonable good faith effort to prevent the child from engaging in delinquent conduct or engaging in conduct indicating a need for supervision and that, despite the parents' or guardians' efforts, the child continues to engage in such conduct, the court or probation department shall waive any sanction that may be imposed on the parents or guardians at any sanction level.
Tex. Fam. Code § 59.015