Modifies the conditions under which a child support order shall terminate

SB 1643 modifies Missouri's child support termination rules, primarily extending support obligations until a child turns 22 if they remain enrolled in secondary or post-secondary education. The bill requires students to maintain at least 12 credit hours per semester (excluding summer), achieve passing grades, and submit academic documentation to both parents to continue eligibility. Support automatically ends upon the child's death, marriage, military enlistment, reaching age 22 (unless education continues), or becoming self-supporting. Additional provisions allow extensions for incapacitated children and require courts to consider tax exemption waivers for college students.