Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1990 , the original copy of the Commonwealth of Australia Constitution Act 1900 from the Public Records Office in London was lent to Australia , and the Australian government requested permission to keep the copy .
Simplified: In 1990 , the Public Records Office in London loaned the original copy 1900 of the Commonwealth of Australia Constitution Act to Australia . The Australian government wanted to keep the copy .