HDB OCS means the Optional Element Scheme, and that is an choose-in system for new flat purchasers, especially for BTO and SERS substitution flats. The scheme permits buyers to have necessary finishes and fittings, for example flooring for living rooms and bedrooms, inside doors, and sanitary fittings, mounted by HDB https://hdb-ocs-320-2283714.webbuzzfeed.com/37587208/hdb-ocs-320-22