We're doing Canada for the comparision, so I won't be able to help with questions about any other countries. Sorry!
Structural ProtectionsThese are mechanisms created by the Constitution that indirectly protect the rights of individuals. Structural protections include representative government (which ensures that the government does not abuse rights) and the separation of powers (which allows courts to enforce the law fairly and without political bias).
Express RightsExpress rights are explicitly stated in the Constitution. They are entrenched, meaning that they cannot be removed without a referendum (section 128). They are also fully enforceable, meaning that the High Court can declare any laws that breach express rights as invalid. Our 5 express rights are: free interstate trade and commerce (section 92), freedom to practice religion (section 116
1), right to trial by jury for Commonwealth indictable offences (section 80), not to be discriminated against on the basis of which state you live in (section 117), and the right to receive "just terms" when property is acquired by the Commonwealth (section 51 xxxi).
Implied Right2Implied rights are not explicitly stated in the Constitution, but arise due to the High Court's interpretation of some sections of the Constitution, and are fully enforceable (any laws that breach these rights can be declared invalid by the High Court). The High Court will imply rights if they believe the writers of the Constitution intended for these rights to exist. One such interpretation in the Australian Capital Television case in 1991 led to the freedom of communication on political matters (which is our only implied right). The Commonwealth passed the
Political Broadcasts and Political Disclosures Act (1991) to ban some political advertising on radio and television during election campaigns. Once this was challenged, the High Court decided that for the government to be truly representative, they must be able to communicate freely with the public, and the public must be able to openly discuss political matters, be informed, and share their opinions. This was due to the representative democracy set up by the Constitution as a whole, and sections 7 and 24 stating that both houses of parliament must be "directly chosen by the people".
In 1997, defamatory comments were made about Lange (a former prime minister of New Zealand) on Four Corners. The High Court's interpretation in this case led to the scope of the implied right being narrowed; after this, it only allowed for the freedom of communication on political matters relevant to the Australian system.
Common law and Legislative approaches to protections
Wait...is this SAC strictly to do with the last few dot-points from AOS2? If so, then you shouldn't need to know anything about those yet.
Common law is law made by the courts, anyway (also known as case law or court law).
Evaluate the effectiveness of Australia's Constitution in protecting human and democratic rightsAustralia's Constitution is effective at protecting human and democratic rights to an extent. The representative system set up by the Constitution (especially sections 7 and 24) ensures that the government will not treat citizens unfairly or violate their rights out of fear that they will lose office. Similarly, the government will not be able to act in a way that voters believe is unacceptable due to regular elections, which provide an opportunity for any rights' abuses to be "corrected" by the voters. This is because they can elect new law-makers that will remove laws infringing any rights.
However, this does not ensure that the rights of unpopular minorities (such as asylum seekers) will be protected. If parliament passes laws that breach their rights, the majority may be unaware or indifferent of this abuse; they may not vote the government out. Even if the majority do want to remove the government and elect new law-makers, they cannot do so until the three-year term of parliament has ended - this means that any rights' abuses in the meantime will go uncorrected, and does not help those who have already had their rights infringed.
Another reason it is effective is because the 5 express rights are entrenched. This means that (due to the referendum process in section 128) they cannot be removed without the consent of the voters. Express rights and the implied right are all fully enforceable, which means that any law made by the Commonwealth that violates one of these rights can be declared invalid by the High Court when challenged.
Despite this, it is ineffective as the express rights are very limited (both in operation and number). An example of this is the right to trial by jury (section 80) which is limited to Commonwealth indictable offences. However, the Commonwealth decides which offences are indictable, and most criminal laws are made by the states.
^And maybe mention the separation of powers too, somewhere.
1 I don't think this right prevents the states from legislating about religion, though.
2 Not sure if you're clear about this or not, but just in case: there is no right to vote. (A right is something that can't be taken away, and you can be prevented from voting for substantial reasons, like conviction of treason. That's just a brief explanation.)
I'm guessing the question(s) worth the most marks on your SAC will be something to do with comparing Australia and Canada, and/or evaluating the effectiveness of Australia's Constitution in protecting human and democratic rights, so make sure you know those really well.