Retro policy year means the policy year in which an employer is enrolled in group retrospective rating. Claim losses which occur during this year will be tracked for all retro group members and refunds or assessments will be distributed based on those losses in the subsequent evaluation period. The retro policy year start and end date will match that of the rating policy year. For public employer taxing districts, the retro policy year shall be January first through December thirty-first of a year. For private employers, the retro policy year shall be July first through June thirtieth of the following year.