Breaking the law

Dear Prime Minister,

Yesterday Behrouz Boochani said:

What do you believe is Australia's obligation to comply with International law? When I rang Minister Dutton's office last year his staff member told me that we don't have to obey International law unless we are forced to. Is this only Minister Dutton's approach to the law or is it true of the whole Government? If so, under what circumstances can we choose which laws to ignore? For example, can a politician use the power of his/her office to break international law if he/she decides that doing that will help them win an election? How can domestic law and order be upheld when International law is broken?