(a)(1)(A) If the defendant is found to be the parent of the child, the court or family support magistrate shall order the defendant to stand charged with the support and maintenance of such child, with the assistance of any other parent if such parent is financially able, as the court or family support magistrate finds, in accordance with the provisions of subsection (b) of § 17b-179, or § 17a-90, 17b-81, 17b-223, 17b-745, 46b-129, 46b-130 or 46b-215, to be reasonably commensurate with the financial ability of the defendant, and to pay a certain sum periodically until the child attains the age of eighteen years or as otherwise provided in this subsection. If such child is unmarried and a full-time high school student, such support shall continue according to the parents’ respective abilities, if such child is in need of support, until such child completes the twelfth grade or attains the age of nineteen, whichever occurs first.

(B) The court or family support magistrate shall order the defendant to pay such sum to the complainant, or, if a town or the state has paid such expense, to the town or the state, as the case may be, and shall grant execution for the same and costs of suit taxed as in other civil actions, together with a reasonable attorney’s fee, and may require the defendant to become bound with sufficient surety to perform such orders for support and maintenance. In IV-D support cases, the IV-D agency or a support enforcement agency under cooperative agreement with the IV-D agency may, upon notice to the obligor and obligee, redirect payments for the support of any child receiving child support enforcement services either to the state of Connecticut or to the present custodial party, as their interests may appear, provided neither the obligor nor the obligee objects in writing within ten business days from the mailing date of such notice. Any such notice shall be sent by first class mail to the most recent address of such obligor and obligee, as recorded in the state case registry pursuant to § 46b-218, and a copy of such notice shall be filed with the court or family support magistrate if both the obligor and obligee fail to object to the redirected payments within ten business days from the mailing date of such notice. All payments made shall be distributed as required by Title IV-D of the Social Security Act.

(2) In addition, the court or family support magistrate shall include in each support order in a IV-D support case a provision for the health care coverage of the child. Such provision may include an order for either parent or both parents to provide such coverage under any or all of subparagraphs (A), (B) or (C) of this subdivision.

(A) The provision for health care coverage may include an order for either parent to name any child as a beneficiary of any medical or dental insurance or benefit plan carried by such parent or available to such parent at a reasonable cost as described in subparagraph (D) of this subdivision. If such order requires the parent to maintain insurance available through an employer, the order shall be enforced using a National Medical Support Notice as provided in § 46b-88.

(B) The provision for health care coverage may include an order for either parent to: (i) Apply for and maintain coverage on behalf of the child under the HUSKY Plan, Part B; or (ii) provide cash medical support, as described in subparagraphs (E) and (F) of this subdivision. An order under this subparagraph shall be made only if the cost to the parent obligated to maintain coverage under the HUSKY Plan, Part B, or provide cash medical support is reasonable, as described in subparagraph (D) of this subdivision. An order under clause (i) of this subparagraph shall be made only if insurance coverage as described in subparagraph (A) of this subdivision is unavailable at reasonable cost to either parent, or inaccessible to the child.

(C) An order for payment of the child’s medical and dental expenses, other than those described in clause (ii) of subparagraph (E) of this subdivision, that are not covered by insurance or reimbursed in any other manner shall be entered in accordance with the child support guidelines established pursuant to § 46b-215a.

(D) Health care coverage shall be deemed reasonable in cost if: (i) The parent obligated to maintain such coverage would qualify as a low-income obligor under the child support guidelines established pursuant to § 46b-215a, based solely on such parent’s income, and the cost does not exceed five per cent of such parent’s net income; or (ii) the parent obligated to maintain such coverage would not qualify as a low-income obligor under such guidelines and the cost does not exceed seven and one-half per cent of such parent’s net income. In either case, net income shall be determined in accordance with the child support guidelines established pursuant to § 46b-215a. If a parent obligated to maintain insurance must obtain coverage for himself or herself to comply with the order to provide coverage for the child, reasonable cost shall be determined based on the combined cost of coverage for such parent and such child.

(E) Cash medical support means (i) an amount ordered to be paid toward the cost of premiums for health insurance coverage provided by a public entity, including the HUSKY Plan, Part A or Part B, except as provided in subparagraph (F) of this subdivision, or by another parent through employment or otherwise, or (ii) an amount ordered to be paid, either directly to a medical provider or to the person obligated to pay such provider, toward any ongoing extraordinary medical and dental expenses of the child that are not covered by insurance or reimbursed in any other manner, provided such expenses are documented and identified (I) specifically on the record, or (II) in an affidavit, made under oath, that also states that no restraining order issued pursuant to § 46b-15 or protective order issued pursuant to § 46b-38c, between the parties is in effect or pending before the court. Cash medical support, as described in clauses (i) and (ii) of this subparagraph, may be ordered in lieu of an order under subparagraph (A) of this subdivision to be effective until such time as health insurance that is accessible to the child and reasonable in cost becomes available, or in addition to an order under subparagraph (A) of this subdivision, provided the total cost to the obligated parent of insurance and cash medical support is reasonable, as described in subparagraph (D) of this subdivision. An order for cash medical support shall be payable to the state or the custodial party, as their interests may appear, provided an order under clause (i) of this subparagraph shall be effective only as long as health insurance coverage is maintained. Any unreimbursed medical and dental expenses not covered by an order pursuant to clause (ii) of this subparagraph are subject to an order for unreimbursed medical and dental expenses pursuant to subparagraph (C) of this subdivision.

(F) Cash medical support to offset the cost of any insurance payable under the HUSKY Plan, Part A or Part B, shall not be ordered against a noncustodial parent who is a low-income obligor, as defined in the child support guidelines established pursuant to § 46b-215a, or against a custodial parent of children covered under the HUSKY Plan, Part A or Part B.

(3) The court or family support magistrate may also make and enforce orders for the payment by any person named herein of past-due support for which the defendant is liable in accordance with the provisions of § 17a-90 or 17b-81, subsection (b) of § 17b-179 or § 17b-223, 46b-129 or 46b-130 and, in IV-D cases, order such person, provided such person is not incapacitated, to participate in work activities which may include, but shall not be limited to, job search, training, work experience and participation in the job training and retraining program established by the Labor Commissioner pursuant to § 31-3t. The defendant’s liability for past-due support under this subdivision shall be limited to the three years next preceding the filing of the petition.

(4) If the defendant fails to comply with any order made under this section, the court or family support magistrate may commit the defendant to a community correctional center, there to remain until the defendant complies therewith; but, if it appears that the parent receiving support does not apply the periodic allowance paid by the defendant toward the support of such child, and that such child is chargeable, or likely to become chargeable, to the town where it belongs, the court, on application, may discontinue such allowance to the parent receiving support, and may direct such allowance to be paid to the selectmen of such town, for such support, and may issue execution in their favor for the same. The provisions of § 17b-743 shall apply to this section. The clerk of the court which has rendered judgment for the payment of money for the maintenance of any child under the provisions of this section shall, within twenty-four hours after such judgment has been rendered, notify the selectmen of the town where the child belongs.

(5) Any support order made under this section may at any time thereafter be set aside, altered or modified by any court issuing such order upon a showing of a substantial change in the circumstances of the defendant or another parent of such child or upon a showing that such order substantially deviates from the child support guidelines established pursuant to § 46b-215a, unless there was a specific finding on the record at a hearing, or in a written judgment, order or memorandum of decision of the court, that the application of the guidelines would be inequitable or inappropriate. There shall be a rebuttable presumption that any deviation of less than fifteen per cent from the child support guidelines is not substantial and any deviation of fifteen per cent or more from the guidelines is substantial. No such support orders may be subject to retroactive modification, except that the court may order modification with respect to any period during which there is a pending motion for a modification of an existing support order from the date of service of the notice of such pending motion upon the opposing party pursuant to § 52-50.

(6) Failure of the defendant to obey any order for support made under this section may be punished as for contempt of court and the costs of commitment of any person imprisoned therefor shall be paid by the state as in criminal cases.

(b) (1) Except as provided in subdivision (2) of this subsection, a judgment of parentage entered by the Superior Court or family support magistrate pursuant to this chapter may not be opened or set aside unless (A) a motion to open or set aside is filed not later than four months after the date on which the judgment was entered, and (B) upon a showing (i) of reasonable cause, or (ii) that a valid defense to the petition for a judgment of parentage existed, in whole or in part, at the time judgment was rendered, and the person seeking to open or set aside the judgment was prevented by mistake, accident or other reasonable cause from making a valid defense.

(2) The Superior Court or a family support magistrate may consider a motion to open or set aside a judgment of parentage filed more than four months after such judgment was entered if such court or magistrate determines that the judgment was entered due to fraud, duress or material mistake of fact. The burden of proof shall be on the person seeking to open or set aside such judgment. If the court or family support magistrate determines such person has met the burden of proof under this subdivision, the judgment shall be set aside only if the court or family support magistrate determines that doing so is in the best interest of the child, based on the relevant factors set forth in § 46b-475.

(3) Whenever the Superior Court or family support magistrate opens a judgment of parentage entered pursuant to this section in which a person was found to be the parent of a child who is or has been supported by the state and the court or family support magistrate finds that the person adjudicated the parent is not the parent of the child, the Department of Social Services shall refund to such person any money paid to the state by such person during the period such child was supported by the state.

(c) In IV-D support cases, as defined in subdivision (13) of subsection (b) of § 46b-231, a copy of any support order established or modified pursuant to this section or, in the case of a motion for modification of an existing support order, a notice of determination that there should be no change in the amount of the support order, shall be provided to each party and the state case registry within fourteen days after issuance of such order or determination.