HDB flats are primarily meant for owner occupation. Those who wish to sublet their flats must meet the Minimum Occupation Period (MOP) and obtain HDB’s approval before they can do so. This rule applies to both Singapore Citizens (SCs) and Singapore Permanent Residents (SPRs). In 2011, HDB carried out 7,000 flat inspections and took action against 56 flat owners for unauthorised subletting. Of these, HDB...