The phrase "advisory power" is correct and usable in written English.
It can be used in contexts where one entity has the authority to provide advice or recommendations, but not the authority to make binding decisions.
Example: "The committee holds an advisory power, guiding the board on policy decisions without having the final say."
Alternatives: "consultative authority" or "recommendatory power".
For a start, the council supposedly has only advisory powers.
Soon after the formation of the board, which had only advisory powers, the strike ended.
The board, which has only advisory powers, recommended revising the instructions for all pressurized planes, including airliners.
Because of political compromises that forged the charter school law, the Regents cannot block a SUNY-approved school from opening, but they have do have advisory powers.
But, several participants said, the Shiite leadership and others were insisting that the council have only advisory powers, thereby safeguarding the constitutional powers of the executive.
Ellen G. Engleman, who was sworn in as chairwoman on March 24, said the board, which has only advisory powers, would be more aggressive in urging safety changes before state legislatures and other policy-making bodies.
Consumer groups complain that the body will have mainly advisory powers.See article: Should farmers plant GM crops?Britain's home secretary said that Augusto Pinochet, Chile's former dictator, had been found unfit for trial (on charges of torture) by a team of British doctors and that he was "minded" to have him sent back to Chile, probably within a week.
The main organs of the Council are the Parliamentary Assembly, which has mostly advisory powers; the Committee of Ministers, the decision-making body made up of the foreign ministers of the member countries; the Congress of Local and Regional Authorities of Europe whose function is to strengthen democratic institutions at the local level and assist the new democracies; and the Secretariat.
CEUNPA advocates initially giving the UNPA advisory powers and gradually increasing its authority over the UN system.
