u/pompegranatepants99 - Again, he is not licensed, is not over the age of 16, was not driving, seat belt was broken so could not buckle up, etc. Per the law you attached, it even says that

IC 9-19-11-3.6 Safety belt standards; child between eight and 16 years of age; child restraint system or safety belt Sec. 3.6. (a) A person who operates a motor vehicle in which there is a child and that is equipped with a safety belt meeting the standards stated in the Federal Motor Vehicle Safety Standard Number 208 (49 CFR 571.208) commits a Class D infraction if: (1) the child is at least eight (8) years of age but less than sixteen (16) years of age; and (2) the child is not properly fastened and restrained according to the child restraint system manufacturer's instructions by a: (A) child restraint system; or (B) safety belt.