Building owners may consider joining the Household Minor Works Validation Scheme so as to retain three types of minor UBWs (i.e. drying racks, canopies and supporting structures/metal frames for air conditioners) under the dimensional and safety requirements as prescribed in the Building (Minor Works) Regulation (Cap. 123 sub.leg.N). Enforcement action to remove these validated minor works items will not be taken by the Buildings Department unless they become dangerous.