The phrase "advised as to whether" is correct and usable in written English.
It can be used when seeking guidance or clarification on a particular matter or decision.
Example: "I was advised as to whether I should proceed with the project or wait for further information."
Alternatives: "informed about whether" or "counseled on whether".
"Had counsel for the MPS been aware of such material, we are told they would have wanted to understand the nature of it, in order to advise as to whether or not it should be disclosed to the chairman, particularly given the widening of the ambit of the files that the inquiry wished to consider".
Editorial Policy will advise as to whether it is appropriate to take sponsorship for the event and the appropriateness of the proposed sponsor.
Can you advise as to whether the practice sessions for each GP will only be shown once on the Red Button, or will be on a continuous loop for the remainder of the day.
Senators have a right to advise, as well as to decide whether to consent, on judicial nominations.
The review was commissioned by the government in December 2014 to advise it as to whether Australia should institute an emissions trading scheme, and was ordered to consider any international agreements Australia has entered into.
In her current role, she desperately wants to know more about the digital audience, whose behavior is now crucial to structuring deals and advising clients as to whether a particular project will fly.
If you received NHS treatment, your local health authority or health board can advise you as to whether your complaint can be dealt with through the NHS complaints procedure.
On the reluctance of the governor of the Bank of England to save the banks for fear of moral hazard, Darling writes: "I was so desperate that I asked the Treasury to advise me as to whether we could order the bank to take action".
