The phrase "authority of a single" is correct and usable in written English.
It can be used in contexts discussing the power or control held by one individual or entity.
Example: "The authority of a single leader can significantly influence the direction of the organization."
Alternatives: "power of one" or "control of an individual".
(Blackwell's ordination in a Congregational church rested on the autonomous authority of a single congregation).
Someday, he warned, companies could grow so large they "would pass beyond the authority of a single state, and would do business in other states".
The recount process, in its features here described, is inconsistent with the minimum procedures necessary to protect the fundamental right of each voter in the special instance of a statewide recount under the authority of a single state judicial officer.
Joe the Plumber isn't the one running for office - yet! - and it's only mildly disgraceful that John McCain seems to be selling his entire economic policy on the rapidly deflating authority of a single Ohio fabulist.
The violence was the most widespread since the revolution that toppled Mr. Mubarak, and many feared that it would make it harder for the country's populace to again accept the authority of a single leader.
To make sure the companies remained accountable to government, he said the federal government should "grant charters of incorporation in cases where the public good may require them, and the authority of a single state may be incompetent".
People have compared this confrontation between massed forces of authority and a single protester with the famous image of a man facing a column of tanks in Tiananmen Square in 1989, or the 1967 photograph of a "flower child" in front of a row of armed soldiers at the Pentagon.
Above all it addresses the need for a clear line of authority, allowing a single entity to foster macroeconomic stability and ensure that financial firms, individually or collectively, do not upset the applecart.
Rose, who is enduring the strict authority of her single father, a stuffy businessman, runs away to New York and tracks down her mother, an actress named Lillian Mayhew Julianne Mooree), who left the family to pursue her career, and her brother, Walter (Cory Michael Smith), whom she locates based on a postcard that he sent her from the Museum of Natural History.
He turned himself into the foremost authority on the history of a single block.
It vested unprecedented economic authority in a single unelected official, the secretary of the Treasury.
