Question about "convention"

Question

Although I know the word "convention" means "agreement to behave in a particular way", I cannot still simplify the line below.

"Malaysia needs to take control under the Chicago convention of those investigations."

Here is the full context:

Australia's Deputy Prime Minister Warren Truss said the Malaysian statement moved the search to a new phase.

"It moves it to a stage where we are now investigating an accident, a loss of an aircraft and some new decisions will have to be taken now about the direction of future operations," Truss told reporters.

"Malaysia needs to take control under the Chicago convention of those investigations."

The United States said it was sending an undersea Navy drone to Australia, in addition to a high-tech black box detector, to help in the search.

Answer 1

It's very easy to be confused with the sentence because it's a quote and it had to be reported as is.

Let me simplify.

Remove some stuff to get the main idea:

Malaysia needs to take control of those investigations.

Also, "The Chicago convention" is a proper noun and should have been written as "The Chicago Convention". It's a law about airplanes and air travel.

So put it back together:

Malaysia needs to take control of those investigations under the Chicago Convention.

Answer 2

If I rearrange the sentence it will come down to -

"...needs to take control of those investigation under Chicago convention"

I think "under Chicago convention" means here "in accordance with or following Chicago convention"

See the definition 5 of Under

Under - according to a particular law, agreement, or system

Example -

1. Under the terms of the agreement, our company will receive 40% of the profits.
2. The boy is considered a minor under British law.
3. All individuals have basic human rights, that are recognized under international law.