A notice may be served under section 22 to request for information relating to a suspected ud 监督可根据第22条送达通知书，要求提供有关涉嫌违例发展的资料；
2.
A notice may be served under section 23 to request for discontinuation of an ud if the authority is of the opinion that there is an ud 监督如认为有违例发展，便可根据第23条送达通知书，要求中止该违例发展；
