The phrase "it proves necessary" is correct and can be used in written English.
It is typically used to indicate that something is required or becomes necessary in a particular situation. Example: "We have implemented several measures to prevent damage, but if it proves necessary, we may have to evacuate the building."
Choosing to rely on the Bank of England to supervise its banks - and other financial institutions - may prove to be an empty choice if it proves necessary to establish its own supervisory institutions in accordance with what is understood to be EU statutes".
The lawsuit challenges the city's plan to use its power of eminent domain, if it proves necessary, as the only way to acquire and fix the mortgages if the banks and investors are unwilling to negotiate the sale of these loans.
I have asked Congress to authorize the use of America's military if it proves necessary to enforce UN Security Council demands.
Sometimes, it proves necessary to dust down this article more frequently if Lib Dems rudely fail to remain quite as irrelevant as he has decreed.
"Will the prime minister commit that if it proves necessary, his home secretary will meet with the police and crime commissioner, the chief constable and myself to ensure that the highly successful team has the resources it needs to see this investigation to its conclusion?
Potočnik will not oppose an Article 171 structure if it proves necessary, he adds.
"The Republic of Tajikistan has declared its readiness to open its air space to the U.S. Air Force and, should it prove necessary, its airports for carrying out measures against terrorism," a government statement said.
Second, by making credible its willingness to use military force, should it prove necessary to do so, the nation aims to leave potential aggressors in no doubt of the consequences they will suffer if they are tempted to launch an attack.
She promised that if it proved necessary, the board members themselves would review emergency applications.
And in July it agreed to lend to Fannie Mae and Freddie Mac from the window should it "prove necessary".
Mr. Mastriani entered the process about a month ago with the power to outline an imposed settlement if it proved necessary.
