(a) To protect the integrity and accuracy of vital records, a certificate registered under chapter 93 may be amended only in accordance with sections 19a-41 to 19a-45, inclusive, chapter 93, regulations adopted by the Commissioner of Public Health pursuant to chapter 54 and uniform procedures prescribed by the commissioner. Only the commissioner may amend birth certificates to reflect changes concerning parentage or birth or marriage certificates to reflect changes concerning gender change. Amendments related to parentage or gender change shall result in the creation of a replacement certificate that supersedes the original, and shall in no way reveal the original language changed by the amendment. Any amendment to a vital record made by the registrar of vital statistics of the town in which the vital event occurred or by the commissioner shall be in accordance with such regulations and uniform procedures.

(b) The commissioner and the registrar of vital statistics shall maintain sufficient documentation, as prescribed by the commissioner, to support amendments and shall ensure the confidentiality of such documentation as required by law. The date of amendment and a summary description of the evidence submitted in support of the amendment shall be endorsed on or made part of the record and the original certificate shall be marked “Amended”, except for amendments due to parentage or gender change. When the registrar of the town in which the vital event occurred amends a certificate, such registrar shall, within ten days of making such amendment, forward an amended certificate to the commissioner and to any registrar having a copy of the certificate. When the commissioner amends a birth certificate, including changes due to parentage or gender, the commissioner shall forward an amended certificate to the registrars of vital statistics affected and their records shall be amended accordingly.

(c) An amended certificate shall supersede the original certificate that has been changed and shall be marked “Amended”, except for amendments due to parentage or gender change. The original certificate in the case of parentage or gender change shall be physically or electronically sealed and kept in a confidential file by the department and the registrar of any town in which the birth was recorded, and may be unsealed for issuance only as provided in § 7-53 with regard to an original birth certificate or upon a written order of a court of competent jurisdiction. The amended certificate shall become the official record.

(d) (1) Upon receipt of (A) an acknowledgment of parentage executed in accordance with the provisions of sections 46b-476 to 46b-487, inclusive, by both parents of a child, or (B) a certified copy of an order of a court of competent jurisdiction establishing the parentage of a child, the commissioner shall include on or amend, as appropriate, such child’s birth certificate to show such parentage if parentage is not already shown on such birth certificate and to change the name of the child under eighteen years of age if so indicated on the acknowledgment of parentage form or within the certified court order as part of the parentage action. If a person who is the subject of a voluntary acknowledgment of parentage, as described in this subdivision, is eighteen years of age or older, the commissioner shall obtain a notarized affidavit from such person affirming that such person agrees to the commissioner’s amendment of such person’s birth certificate as such amendment relates to the acknowledgment of parentage. The commissioner shall amend the birth certificate for an adult child to change the child’s name only pursuant to a court order.

(2) If the birth certificate lists the information of a parent other than the parent who gave birth, the commissioner shall not remove or replace the parent’s information unless presented with a certified court order that meets the requirements specified in § 7-50, or upon the proper filing of a rescission, in accordance with the provisions of § 46b-570. The commissioner shall thereafter amend such child’s birth certificate to remove or change the name of the parent other than the person who gave birth and, if relevant, to change the name of the child, as requested at the time of the filing of a rescission, in accordance with the provisions of § 46b-570. Birth certificates amended under this subsection shall not be marked “Amended”.

(e) When the parent or parents of a child request the amendment of the child’s birth certificate to reflect a new name of the parent who gave birth because the name on the original certificate is fictitious, such parent or parents shall obtain an order of a court of competent jurisdiction declaring the person who gave birth to be the child’s parent. Upon receipt of a certified copy of such order, the department shall amend the child’s birth certificate to reflect the parent’s true name.

(f) Upon receipt of a certified copy of an order of a court of competent jurisdiction changing the name of a person born in this state and upon request of such person or such person’s parents, guardian, or legal representative, the commissioner or the registrar of vital statistics of the town in which the vital event occurred shall amend the birth certificate to show the new name by a method prescribed by the department.

(g) When an applicant submits the documentation required by the regulations to amend a vital record, the commissioner shall hold a hearing, in accordance with chapter 54, if the commissioner has reasonable cause to doubt the validity or adequacy of such documentation.

(h) When an amendment under this section involves the changing of existing language on a death certificate due to an error pertaining to the cause of death, the death certificate shall be amended in such a manner that the original language is still visible. A copy of the death certificate shall be made. The original death certificate shall be sealed and kept in a confidential file at the department and only the commissioner may order it unsealed. The copy shall be amended in such a manner that the language to be changed is no longer visible. The copy shall be a public document.

(i) The commissioner shall issue a new birth certificate to reflect a gender change upon receipt of the following documents submitted in the form and manner prescribed by the commissioner: (1) A written request from the applicant, signed under penalty of law, for a replacement birth certificate to reflect that the applicant’s gender differs from the sex designated on the original birth certificate; (2) a notarized affidavit by a physician licensed pursuant to chapter 370 or holding a current license in good standing in another state, a physician assistant licensed pursuant to chapter 370 or holding a current license in good standing in another state, an advanced practice registered nurse licensed pursuant to chapter 378 or holding a current license in good standing in another state, or a psychologist licensed pursuant to chapter 383 or holding a current license in good standing in another state, stating that the applicant has undergone surgical, hormonal or other treatment clinically appropriate for the applicant for the purpose of gender transition; and (3) if an applicant is also requesting a change of name listed on the original birth certificate, proof of a legal name change. The new birth certificate shall reflect the new gender identity by way of a change in the sex designation on the original birth certificate and, if applicable, the legal name change.

(j) The commissioner shall issue a new marriage certificate to reflect a gender change upon receipt of the following documents, submitted in a form and manner prescribed by the commissioner: (1) A written request from the applicant, signed under penalty of law, for a replacement marriage certificate to reflect that the applicant’s gender differs from the sex designated on the original marriage certificate, along with an affirmation that the marriage is still legally intact; (2) a notarized statement from the spouse named on the marriage certificate to be amended, consenting to the amendment; (3) (A) a United States passport or amended birth certificate or court order reflecting the applicant’s gender as of the date of the request or (B) a notarized affidavit by a physician licensed pursuant to chapter 370 or holding a current license in good standing in another state, physician assistant licensed pursuant to chapter 370 or holding a current license in good standing in another state, an advanced practice registered nurse licensed pursuant to chapter 378 or holding a current license in good standing in another state or a psychologist licensed pursuant to chapter 383 or holding a current license in good standing in another state stating that the applicant has undergone surgical, hormonal or other treatment clinically appropriate for the applicant for the purpose of gender transition; and (4) if an applicant is also requesting a change of name listed on the original marriage certificate, proof of a legal name change. The new marriage certificate shall reflect the new gender identity by way of a change in the sex designation on the original marriage certificate and, if applicable, the legal name change.