Vt. Stat. Ann. tit. 28, § 812

If during the term of confinement an inmate commits any offense or violates any rule or regulation of the facility wherein he or she is confined, all or a portion of his or her good behavior reductions for the month of the offense or violation may be denied. Denial or forfeiture of good behavior reductions shall be in accordance with the rules and regulations established by the Commissioner, and in accordance with the procedure established in section 852 of this title. In addition, a maximum of 10 days of any previously earned reductions may be forfeited for each subsequent offense or violation of any rule or regulation that occurs in the same month.