法律依据请跟这楼
BCA的2015 的circular
Paragraph 5(3) of the prescribed by-laws under the Second Schedule to the Building Maintenance (Strata Management) Regulations 2005 states that a subsidiary proprietor (SP) or occupier of a lot shall not be prevented from installing any structure or device to prevent harm to children (an extract is appended in the Annex). Such structures/devices include safety grilles at windows and balconies.
5 There may be situations where the MC has not set design guidelines for safety grilles, or is unable to pass the design guidelines by-law through a general meeting. In such situations, the MC will have to decide on the approval of the installation of such structure/devices on a case-by-case basis. If there are no prevailing design guidelines, the MC should consider the SP's proposed design to see if it can be adopted by all other SPs wanting to install safety grilles to ensure uniformity in appearance with the rest of the building in the development.
5 There may be situations where the MC has not set design guidelines for safety grilles, or is unable to pass the design guidelines by-law through a general meeting. In such situations, the MC will have to decide on the approval of the installation of such structure/devices on a case-by-case basis. If there are no prevailing design guidelines, the MC should consider the SP's proposed design to see if it can be adopted by all other SPs wanting to install safety grilles to ensure uniformity in appearance with the rest of the building in the development.