The phrase "arbiter for" is correct and usable in written English.
You can use it to describe someone who serves as an impartial judge or expert to resolve a dispute or decide a controversial issue. For example, "The school board appointed a respected teacher to serve as the arbiter for the debate club's competition."
As far as Pandora's concerned, there could be no better arbiter for parliamentary spats.
Dependency drives profits, the ultimate arbiter — for some — of an innovation's success.
Why should these people suddenly become funny?" Then again, who should be the arbiter for taste in humor?
Sci-fi lovers, you'll soon have an arbiter for trivia debates: the new edition of the Encyclopedia of Science Fiction is going online in 2012.
The first poet then defended his position, and the debate continued, usually for three rounds, after which the question was presented to an arbiter for resolution.
But, and here's the most welcome sound from a fraught weekend, Pep Guardiola, the Barcelona coach, did not blame the arbiter for either red card.
Although a Socialist, he may not be called a Socialist president, for French presidents, being arbiters for all parties, must resign from their own party on taking office.
"Not like this — this is different," said Salah Negm, a chief news director at Al Jazeera and among the ultimate arbiters for the news operation on broadcasting such footage.
They would be the arbiters, for example, of whether Virginia Tech's victory over Miami was more worthy than the Hurricanes' defeat of Florida State.
They are the first line of arbiters for groups in a product-packed spring, when nine plays and musicals opened in March and 13 more will have opened by the end of April.
"Experiencing as a woman, firsthand, the impacts of countries that are acting as moral arbiters for their people — it really caused me to rethink the positions I held," she says.
