amendment may be required to clarify the situation. An outrage was caused when it was revealed ICAC officers spent four days tapping a man's phone line although their target was a supposed to be female. Also revealed were four cases of unauthorised ICAC tapping of phone conversations between lawyers and their clients in 2007. In 2010, it was reported that the police might have conducted covert surveillance over the phone conversations of participants of the anti-express rail demonstrations. When a district councillor questioned Police Commissioner Tang King Shing regarding the incident, Tang did not respond to the question directly, choosing to reply that the police acts according to law and adopts a stringent management of all covert surveillance operations. Right to vote The right to vote is protected under Article 26 of the Basic Law. Previously, there was a general automatic and indiscriminate restrictions on prisoners' right to vote. A case was brought by two men, Chan Kin-sum and Choi Chuen-sun, who were in jail during the challenge, and Leung Kwok-hung, to challenge the restrictions. Justice Andrew Cheung ruled that inmates have the constitutional right to register as voters and cast their ballots while serving sentences, which was unjustificably infringed by the indiscriminate ban. Two League of Social Democrats activists also applied for a judicial review to challenge the legality of corporate voting on the grounds that it contravened Article 26 or was discriminatory in nature. Justice Andrew Cheung dismissed the applications, emphasising that his judgment was solely concerned with the constitutionality of corporate voting rather than the political wisdom of corporate voting or functional constituencies. Right of abode The definition of Hong Kong permanent residents is listed in Article 24 of the Basic Law, under which this class of persons enjoy the right of abode. However, the conflict between this Article and Article 22 led to extensive controversies and litigations. Due to Hong Kong's proximity to mainland China, controversy has arisen in the right of abode of children born within the city by a mainland mother. Under current law, both the mother and the child is automatically granted right of abode. This has drawn criticism from Hong Kong citizens who argue that instead of wanting to give birth to their children in a better hospital, mainland mothers are exploiting the law in order to receive right of abode. Proponents for the law, including private doctors, claim that the law