(6) No person shall be tried for a criminal offence if he shows that he has been pardoned for that offence. (7) No person who is tried for a criminal offence shall be compelled to give evidence at the trial. (8) Any court or other adjudicating authority prescribed by law for the determination of the existence or extent of any civil right or obligation shall be established by law and shall be independent and impartial; and where proceedings for such a determination are instituted by any person before such a court or other adjudicating authority, the case shall be given a fair hearing within reasonable time. (9) Except with the agreement of all parties thereto, all proceedings of every court and proceedings for the determination of the existence or extent of any civil right or obligation before any other adjudicating authority, including the announcement of the decision of the court or other authority, shall be held in public. (10) Nothing in subsection (9) shall prevent the court or other adjudicating authority from excluding from the proceedings persons other than the parties thereto and their legal representatives to such extent as the court or other authority— (a) may by law be empowered to do and may consider necessary or expedient in circumstances where publicity would prejudice the interests of justice or in interlocutory proceedings or in the interests of public morality, the welfare of persons under the age of eighteen years or the protection of the private lives of persons concerned in the proceedings; or