(a) Any child, other than a high school graduate, who is younger than 21 years of age and eligible for enrollment on September 1 of any school year may transfer annually from the child's school district of residence to another district in this state if both the receiving district and the applicant parent or guardian or person having lawful control of the child jointly approve and timely agree in writing to the transfer.
(b) A transfer agreement under this section shall be filed and preserved as a receiving district record for audit purposes of the agency.
(c) In the case of a transfer under this section, a child's school district of residence shall provide the receiving district with the child's disciplinary record and any threat assessment involving the child's behavior conducted under Section 37.115.