The phrase "allowed to intervene" is correct and usable in written English.
It can be used in contexts where permission or authorization to take action or participate in a situation is being discussed.
Example: "The committee members are allowed to intervene if they believe the discussion is going off track."
Alternatives: "permitted to intervene" or "authorized to intervene".
In November 2012, as Goma fell, members of the force merely stood by, watching as the rebels marched in town, because they were not allowed to intervene.
The memo is a bit strange, because Hunt was not allowed to lobby Cable, and David Cameron was not allowed to intervene in the decision either.
So there you have it: a company with problems should be free to take over a bigger, stronger rival, and no foreigner should be allowed to intervene.
In addition, an attorney for the religious group Alliance Defending Freedom argued on behalf of the Prince William County's clerk, which was allowed to intervene in the case.
Ann Beeson, a litigation director at the civil liberties union, said her group was exploring whether to seek to be allowed to intervene as a party.
On Monday the UN Security Council agreed that France, which anyway has some 1,100 soldiers in the country (usually kept in barracks) and some aircraft, should be allowed to intervene.
Some first approach can be seen in the technology described in [10] which allows to intervene in the operation mode of connected electric consumer goods.
"California courts have repeatedly allowed proponents to intervene to defend initiatives they have sponsored," the lawyers wrote.
The advent of therapeutic hypothermia has for the first time allowed us to intervene and alter the course of this disease with improved rates of intact survival [ 9].
Observers were instructed in a 'serious error' protocol which allowed them to intervene if they witnessed an administration which was potentially dangerous.
