You are not permitted to marry any blood relations. It's one of the questions asked before getting married in Australia. Birth problems are probable if they have children, and you cannot marry a blood related to avoid this. This rule exists to prevent people from marrying too closely, thereby creating another family tree with all its consequences.
However, it is allowed to marry someone who has been adopted because you want their life not to be complete without parents or siblings. Also, if a person does not know that they are blood related to someone else, then it is possible to marry them. Finally, if two people love each other very much but were born into different families, they can get married for example by a Christian priest or rabbi.
In Australia, there are only two ways to get married: either through a religious organization or officially by a civil servant (a registrar). If you choose to get married by a religious official, they will perform your wedding ceremony anywhere as long as it's within the confines of his/her church or synagogue. If you want a license issued by a government office, you can get it from a Department of Human Services (DHS) location.
Many (though not all) states now allow you to date your blood relative's cousin. Cousins through marriage should be no problem. However, I don't believe I'd make this widely known because it could raise some eyebrows. And, as far as I can see, there is no need to reveal it.
Today's Cousin Marriages Cousin weddings are still common over the world, with an estimated 10% of all marriages taking place between cousins, and as high as 50% in some places.
However, under Australian law, you can marry a cousin, niece, nephew, or even an aunt or uncle. If you want to marry your cute cousin, you have the legal and personal right to do so as long as you are not compelled to marry a relative. You should know that no one has ever been forced to marry in Australia.
In order for someone to be forced to marry, they need to be given permission by the government to withhold this requirement. For example, if a husband or wife is considered unfit to marry, then the other party is allowed to refuse them. In this case, the relatives would not be forced to marry but could still choose to do so.
Relatives were originally not allowed to marry one another but that rule was changed about a hundred years ago. Originally, only siblings were prohibited from marrying one another, but now any two people related by blood or marriage are permitted to marry one another.
As far as ethnicity is concerned, it does not matter what race you are when you get married in Australia. It is possible for a person of different ethnic origins to be married in Australia. For example, a Chinese-Australian woman might marry a white American man. Likewise, a white Australian woman might marry a black African man. The only thing that matters is that you are both eligible to marry under Australian law.
So, what isn't permitted? Well. That's pretty much it. There are no other restrictions based on gender, relationship status, age, or ancestry.
In some states, such as New South Wales, it is illegal for any family member to contract out another person's marriage. This includes spouses, partners, siblings, parents, children, grandparents, grandchildren, aunts, uncles, and cousins.
In other states, such as Victoria, there is no restriction on who can marry whom. However, only individuals over 18 can enter into a marriage contract, so siblings would need to get married before turning 18.
In Australia, there are two types of marriages: civil ceremonies and religious rites. Only civil ceremonies can legally bind two people together; anything else is simply a declaration of intent for future actions. Religious rites are special ceremonies held by priests of various religions in order to bless marriages. These ceremonies are not required by law but are often done as a matter of tradition. As far as the government is concerned, they are just two people who have said "I do" to each other with a pastor or priest present.
Marriage between ancestors and descendants, as well as between siblings, is prohibited, however the Minister of Justice may give a dispensation in the instance of siblings via adoption. Marriages between third and fourth degree blood relatives are legal, but both spouses must sign a declaration of consent. The minister can also grant a dispensation for this type of marriage.
In Israel, marriages between close relatives (grandparents, parents, children, siblings) are illegal except where a religious court grants a get (writ of divorce). If not divorced, these couples are considered married until one of them dies or formally divorces themselves. The government does not recognize other types of relationships as "marriages."
According to Jewish law, marriages between first cousins are invalid, although some rabbis will perform such marriages if they believe that doing so will prevent further descent into sinfulness. In ancient times, before modern medicine, doctors believed that if a couple was found physically attractive and had many children there would be no reason why they should not have more children after their first cousin marriage. As a result, many first cousins married each other. However, according to Jewish law, if these two people have any possibility of having healthy children, they must wait until they are old enough to be married without violating the biblical prohibition on marrying one's daughter-in-law.