The phrase "operating branch" is grammatically correct and can be used in written English.
It is typically used to refer to a specific location or department within a larger organization or business that is responsible for carrying out operations or daily tasks. Example: The company's main headquarters is in New York, but they also have an operating branch in Chicago to serve their clients in the Midwest.
In this context El-Baradei, former president of the IAEA (the operating branch of the United Nations for nuclear matters), and Nobel peace prize winner, presents itself as probably presidential candidate to run against Mubarak and most of all against the system based on the name of Pharaoh.
Across town, at the Ottendorfer branch on Second Avenue at Eighth Street (the oldest operating branch in the city), the rooms were shabby, worn, dingy; a wallful of paperbacks (mystery, romance, science fiction) lined the entry way.
On Second Avenue, Felicella entered the oldest operating branch in the New York Public Library system — the red brick Ottendorfer branch, known as the Freie Bibliothek und Lesehalle in the eighteen-eighties, when St. Mark's Place was on the edge of Kleindeutschland and its builder, Oswald Ottendorfer, published Staats-Zeitung.
Both these models involve gathering deposits and operating branches on a large scale.
One of his early scoops was about student activists in Karachi, who were operating branches of violent gangs at their universities.
The university operates branch campuses in Gallup, Los Alamos, and in Valencia county, and graduate centres in Los Alamos and Santa Fe.
The university also operates branch campuses in Okmulgee and Oklahoma City and is part of Oklahoma State University-Tulsa (formerly University Center at Tulsa).
It also operates branch galleries in Brookline and South Weymouth, near Boston.
Citigroup is only the second bank to have a license to operate branches revoked.
It operated branches in Brooklyn, Queens, Hicksville, L.I., and in the suburbs of Boston, Philadelphia and Chicago.
EU banks have an automatic "passport" to operate branches in other member states.
