S.A. contract for sale


I have a client buying in Adelaide. Its been a while since I did a loan for a property down there and I am bit rusty on the contract situtaion.

Does the purchaser normally sign a contract with a "subject to finance" clause? If so how long is the subjcet to clause normally for?

we always do around 21 days...14 days was the norm back in the days when banks operated a little faster but 21 days/3 weeks we put now...