再者 自己睇下rss handbook 5.1.2啦
To take into account the continuity of training for professional graduates, subject to prior written acceptance by the managing department for exemption of open recruitment procedures, the Consultant may deploy its professional graduates who have not yet obtained the relevant professional qualifications to take up the assistant professional ranks of the RSS team for the purpose of training pertinent to the acquisition of the concerned professional qualifications.
係因為比training 先開放比無牌做assistant professional rank 例如ARE
仲要書面申請唔做公開招募