"whose remit" is a correct and usable phrase in written English.
You can use it to refer to the responsibility or authority of a specific group or person, e.g. "The board of directors, whose remit includes making decisions on major projects, has agreed to fund the construction."
Parfitt is another station controller whose remit has expanded in recent years.
They were replaced by John Cryan, whose remit was to clean up the bank.
The show's associate director (duly credited as such in the NT's publicity) is Cal McCrystal, whose remit is physical comedy.
He has called for the restructuring of the Forestry Commission whose remit, he said, is out of date.
Bhupathi, whose remit will include new business, is looking to exploit the Scot's potential in the Far East, while Colombini is in charge of his tournament schedule.
PARC is now working with ARPA-E, an American government agency whose remit is to create advanced energy technologies, to try to print entire batteries.
Renate Künast, a leading Green, will head an agricultural ministry whose remit will be widened to include consumer protection and food.
Ameena is one of the few female members of the organisation CeaseFire, whose remit is to stop shootings using science and street outreach.
The Charity Commission, whose remit does not include education matters, issued the trust with an action plan last September after an inspection identified regulatory concerns about its governance.
Plymouth had a writer in residence in 2011, the poet Hannah Silva, whose remit was simply to raise the profile of literature among residents.
The aim is to appoint a director of coaching and a person charged with overseeing strategy, whose remit would include data analysis and administration.
