Vt. Stat. Ann. tit. 32, § 4262

When the listers fail to subscribe and attach to the grand list the oath prescribed in section 4151 of this title within the time required, or fail to lodge the grand list within the time prescribed in such section, or if a defective or invalid grand list is lodged within the time so prescribed, or if such grand list is otherwise defective or invalid, on or before February 15 next ensuing, the listers shall correct any defective grand list theretofore lodged in the town clerk’s office, subscribe and append thereto the oath prescribed, and perform any act theretofore omitted that is necessary to render such grand list valid.