In any ancient burying ground, as referenced in Title 30-A, section 5723, or public burying ground in which any Revolutionary soldiers or sailors or veterans of the Armed Forces of the United State of America who served in any war are buried, the municipality in which said burying ground is located shall keep in good condition and repair all graves, headstones, monuments or markers designating the burial place of said Revolutionary soldiers or sailors or veterans of the Armed Forces of the United States of America who served in any war and shall keep the grass suitably cut and trimmed on those graves from May 1st to September 30th of each year. [1999, c. 700, §1 (AMD).]