1. Short title This Act may be cited as the Panama Canal Zone Veterans Act of 2023 . 2. Presumption of service connection (a) In general Subchapter II of chapter 11 of title 38, United States Code, is amended by adding at the end the following new section: 1120A. Presumption of service connection for illnesses associated with service in the Panama Canal Zone (a) In general (1) For purposes of section 1110 of this title, and subject to section 1113 of this title, each illness, if any, described in paragraph (2) shall be considered to have been incurred in or aggravated by service referred to in that paragraph, notwithstanding that there is no record of evidence of such illness during the period of such service. (2) An illness referred to in paragraph (1) is any illness— (A) that— (i) is described in paragraph (3); or (ii) the Secretary determines in regulations prescribed under this section warrants a presumption of service connection by reason of having a positive association with exposure to an herbicide agent known or presumed to be associated with service in the Armed Forces in or near the Panama Canal Zone during the covered period