building and construction law assignment

Varriation can often provide a fertile source of disputes arising under building contracts. Issuel such as whether or not a principal has the power to instruct tha variation amount to a project be carried out udder a building contract, the scope and pricing of instructed variation and the ability to claim tha an instruction amount ton the a variation of a contract are just some of the grounds that can  give rise to disputes under building contract in relation to variation. Review related cases in which the issue of variation was considered and discuss the major legal principle that can be drawn from these judgment in Australia
What charges wound you make to standard Australian contract AS400 to improve that contract clauses dealing with variation  based on your review of the relevant cases law.