I am not entirely sure why the categories are kept distinct, but it seems safe to infer that the question is about your ability to support yourself and those that rely upon you, in connection with an assessment of the risk that you may become a burden on Australian taxpayers.
In effect, if you ceased to be able to provide (out of work, ill, too old etc) and had insufficient savings, how many people would become a burden on the state unless they found a means to support themselves?
- give detail of dependant children under 18
dependent means they rely on you financially for their support.
children means those that you fathered or mothered (as appropriate), or adopted, or acknowledged as your progeny from around the time of their birth, or for whom a court has decided you are responsible.
under 18 means born less than 18 years earlier than the time you complete the form.
- give detail of brothers, sisters and other dependent family member
brothers and sisters are those who through blood share one or more parent with you, or are a child, defined as above, of one or other of your parents.
other dependent family member is everyone who is neither a child of yours aged under 18 children nor your brother nor sister, and who relies on you financially for support.
No doubt the courts have refined the definitions above but if more subtle distinction may be relevant then I suggest you consult a lawyer.
To repeat what was a Comment:
A dependant is someone who relies upon you for financial support (so for example might include a partner not married to the provider). A dependent family member is a dependant with familial ties to the provider (eg a spouse perhaps).
Note that in Australian English, dependant (with an a) is a noun, dependent (with an e) is an adjective. American English does not distinguish dependant and dependent and does not spell either with an a. (As kindly pointed out by @Dorothy there is an entire post devoted to exactly what I cover in this note.)What are the rico charges? What is the meaning of bwv? What does purple heart mean in text? What is steve harvey's net worth? How to make a mule? How to lighten your private area fast? How to get a gmail account? How to bleach hair tips only? What does repression mean? How to remove section breaks in word? How to screenshot on computer? How to become a nail tech? How to get rid of calcium deposits? How to wear boots with jeans? What does 6 mean? How to fix sore throat? Tips when carving a pumpkin? Tips on how to make love to a virgin? How much are tips on a 7 day cruise? What is apple cider vinegar good for? Ombre with dark roots and lighter tips at home how long? Tips for traveling with toddler who is being potty trained? What is the meaning of extravaganza? What does naltrexone do? What is the meaning of neutron? How to do magic tricks tutorial? How to use dropbox? What does 18 mean? Adult baby tips how to use a diaper? where does wii u usb helper save games What are protons? what is the best wow quest helper What does power of the dog mean? What is the score in bridge if you go down 3 tricks doubled and redoubled not vulnerable? When he died lemon demon meaning? Dionne warwick that's what friends are for? How to delete safari history? What does it mean when a woman creams? How to get rid of sunburn fast? What does kiss and tell mean? What do turtles mean in dreams? how community helper help the community What is autosexual? may your phone never be silent when your destiny helper is calling you ✔️ amen how to use constructor as helper
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