DAFF (National Consultative Committee on Animal Welfare): Guidelines for the welfare of pet birds

http://www.daff.gov.au/animal-plant-health/welfare/nccaw/guidelines/pets/birds

“A juvenile bird that is not fully feathered or self-sufficient should not be traded except to a person who has skills and experience in raising such birds.”

NSW: 

Animal Welfare Code of Practice: Animals in Pet Shops 

http://www.dpi.nsw.gov.au/__data/assets/pdf_file/0019/244018/Animal-welfare-code-of-practice-animals-in-pet-shops.pdf

15.1.5  Hand-reared birds must be fully feathered and self-sufficient before sale.

 NSW Animal Welfare Code of Practice # 4: Keeping and Trading of Birds:

http://www.dpi.nsw.gov.au/agriculture/livestock/animal-welfare/codes/aw-code-4#7–Trading

7.3    Juvenile birds unable to feed themselves should not be traded except for the purpose of hand rearing.  The sale of fledglings unable to feed themselves must be restricted to persons competent in the procedures of hand rearing and they must be adequately informed of the nutritional and husbandry requirement of the species and the hygiene and management standards necessary.

Queensland: 

Queensland Code of Practice for Pet Shops:

http://www.dpi.qld.gov.au/documents/AnimalIndustries_AnimalWelfareAndEthics/QldCodeOfPracticeForPetShops.pdf

15.27. Hand-reared birds should be fully weaned and self-sufficient before sale.

Code of Practice: Aviculture: http://www.derm.qld.gov.au/register/p00055aa.pdf

Victoria: 

Wildlife Regulations 2002: Hand-Rearing Birds:

“The hand-rearing of birds held under a private wildlife license may generally only be undertaken by the holder of that licence. Under the Wildlife Regulations 2002, it is illegal to buy, sell, dispose of, consign, convey or transport any egg or any bird that is too young to fly (or, if a flightless bird, is less than four weeks old), for any purpose other than treatment by a registered veterinary surgeon, (whether or not a licence is required), unless the prior written permission of the Secretary has been received.  Contact the Wildlife & Game Licensing Service for more information.”

Northern Territory: 

Guidelines for the Care and Welfare of Caged Birds

http://www.animalwelfare.nt.gov.au/__data/assets/pdf_file/0009/76572/Guidelines_Caged_Birds.pdf

“A juvenile bird that is not fully feathered or self-sufficient should not be traded except to a person who has skills and experience in raising such birds.”