The Government needed to explain its definition of an 'important bill' in relation to a Basic Law provision that could lead to the dissolution of the Legislative Council, lawmakers heard yesterday. Jonathan Daw, legal adviser to the Department of Justice on constitutional aspects of the executive-legislature relationship, was commenting on part of Article 50 of the Basic Law, which says the Chief Executive can dissolve Legco if it 'refuses to pass a budget or any other important bill introduced by the Government'. Mr Daw told the constitutional affairs panel the Chief Executive could decide which bills were 'important'. However, he would advise the Government to give guidelines to help members understand its thinking. Cheung Man-kwong of the Democratic Party was worried that Article 50 would pose a threat to lawmakers. He said a set of clear guidelines was necessary to avoid abuse of power by the Chief Executive. Mr Daw said the overall checks and balances between the Chief Executive's powers and responsibilities were adequate. He said Article 50 only empowered the Chief Executive to dissolve Legco once during his term of office.