Provides that a high school diploma (diploma) or credential issued by a nonaccredited nonpublic school (school) is legally sufficient to demonstrate that the recipient of the diploma or credential has met the requirements to complete high school. Provides that a state or local agency or institution of higher education in Indiana may not reject or otherwise treat a person differently based solely on the source of a diploma or credential. Provides that a person who administers a school has the authority to execute any document required by law, rule, regulation, or policy to provide certain evidence regarding a child's education.