MO HB643

Changes the threshold for criminal nonsupport felony charges from 12 to 18 months of unpaid support arrearages, with a provision to revert to 12 months if Missouri's unemployment rate stays at 6% or lower for six consecutive months.

Adds a new definition of "arrearage" to include reductions or abatements of support obligations during modification proceedings and amounts waived by custodial parents under court-ordered support.

Allows defendants convicted of criminal nonsupport to have their conviction expunged if they satisfy all current child support obligations and make periodic arrearage payments for an additional 24 consecutive months.

Requires periodic payments toward arrears to not exceed 50% of the defendant's adjusted gross income after payroll taxes, medical insurance, and other court-ordered support are deducted.

Clarifies that defendants convicted of or pleading guilty/nolo contendere to criminal nonsupport who are placed on probation or parole must commence current support payments and satisfy arrearages.