Qualified person (QP) appointed carry out prescribed window inspection to ascertain whether the windows have been rendered dangerous or are liable to become dangerous. Where the QP considers that a prescribed repair is required, QP can also actor supervision of the prescribed building repair works and issue the certificate of window repair after all prescribed repair done.

Reference:
http://www.bd.gov.hk/chineseT/documents/guideline/GGMBISMWIS.pdf http://www.bd.gov.hk/chineseT/documents/code/CoP_MBIS_MWISc.pdf