Shall, at its discretion
Wonderful rear-gunner flannelry. Shall, or will, implies an obligation. Discretion implies a right — not just the lack of an obligation, but its very antithesis.
So the driver who steers using this elegant phrase reverses over her own flowerbed and runs herself over.
The word your chauffeuse is looking for is “may”.
Carry on.
See also
Plain English Anatomy™ Noun | Verb | Adjective | Adverb | Preposition | Conjunction | Latin | Germany | Flannel | Legal triplicate | Nominalisation | Murder your darlings