The phrase "are first required" is correct and usable in written English.
It can be used when indicating that something must be done or obtained before proceeding with another action or requirement.
Example: "Before you can register for the course, certain documents are first required to verify your identity."
Alternatives: "must be obtained first" or "are necessary beforehand".
The Devil Rays are first required to ask release waivers on Cox, who had expressed interest in playing in Japan.
For early elections to take place, about a third of the country's 325 Parliament members are first required to call for the matter to be discussed.
To put into motion a rule called Leg Before Wicket, in which a batsman is sent out because his leg is deemed to have unfairly prevented the ball from hitting the post behind him, members of the opposing team are first required to implore the umpire to make a ruling, which they do by yelling, "Howzat?" and possibly other words at him.
In order to sign up for Facebook, all users are first required to agree to the "Terms of Service".
But some groups of borrowers are first required to save money that they can put down as collateral; others must outline their business ideas to lenders.
At least, some groups of borrowers are first required to save money that they can put down as collateral; others must outline their business ideas to lenders.
Buildings were first required to recycle gray water — from the laundry or shower — and reuse it for irrigation.
English passing rates, however, remained unchanged between last year and the year before, when the test was first required for graduation.
Thus, on March 21 , 1556 Cranmer was taken out to be burned, being first required to make his recantation public.
The report, which was first required by Congress in 1998, was based on information provided by American diplomats and others before the attacks of Sept. 11.
