SCENARIO – Please use the following to answer the next question:
Singabank is a boutique bank in Singapore. After being notified during the hiring process, Singabank employees are subject to constant and thorough monitoring and tracking through CCTV cameras, computer monitoring software and keyboard loggers. Singabank does this to ensure its employees are complying with Singabank's data security policy. Bigbank is now considering acquiring Singabank's retail banking division. As part of its due diligence, Bigbank is seeking for Singabank to disclose to it all of its surveillance material on its employees, whether or not they are part of the retail banking division. Jimmy works in Singabank's investment banking division.
What would make Singabank's monitoring of its employees illegal?