Amend Section 1 of SB 1670 by replacing lines (8-12) with the following: (a) If the child is fully enrolled in an accredited secondary school in a program leading toward a high school diploma or enrolled in courses for joint high school and junior college credit pursuant to Section 130.008, Education Code, the court may render an original support order or modify an existing order providing child support past the 18th birthday of the child.