Partial possession refers to an employer taking possession of certain completed sections of a building project before the entire works is finished. An employer may take partial possession for business or commercial reasons, such as starting production early. The contractor's consent is required for partial possession, but the contractor cannot unreasonably withhold consent. If partial possession occurs, it affects the defects liability period for the occupied section, reduces liquidated damages, and triggers the release of part of the retention sum. Items like work insurance, performance bonds, and final certificates remain unaffected by partial possession.