As used in this subchapter:
(1) “Nonresident district” means a school district other than a student's resident district;
(2) “Parent” means a student's parent, guardian, or other person having custody or care of the student;
(3) “Resident district” means the school district in which the student resides as determined under § 6-18-202; and
(4) “Transfer student” means a public school student in kindergarten through grade twelve (K-12) who transfers to a nonresident district through a public school choice option under this subchapter.