The Australian Competition and Consumer Commission (ACCC) has shown its concern over the proposed tie-up between BHP Billiton and Rio Tinto.

The regulator has asked for the submission of all the requisite papers for examining before giving a go ahead to the miners' JV. ACCC wants to see the feasibility of the joint venture and whether it will be able to withhold the supply of iron-ore with its given financial and demand status.

The tie-up is into consideration for the iron-ore operations in Western Australia. Brazil's Vale is also a part of the tie-up and will be partner in the supply decisions.

The ACCC said in its statement that the examining has come up after BlueScope Steel publicly raised concerns over the tie-up. And since it is the significant purchaser of iron-ore, the regulator had to take this step.

The watchdog also said that the A$127.87 worth of tie-up has also seen some changes in the expansion plans of the parties. Also the competitors have made many changes in their plans. All this has asked for a thorough study of the whole thing.

Meanwhile, the global steel companies have shown their anger over the tie-up.