The phrase "sole control" is correct and commonly used in written English.
It means complete or exclusive control over something. Example: The company's CEO has sole control over all major decisions.
In 1964, Mr. Haitink took sole control.
Eventually, Robbins was fired, and Mr. Wise took sole control.
Every time Mr Weill has emerged with sole control.
Importantly, the Israelis were left in sole control of Jerusalem.
Mr. Arafat has long played factions and subordinates off against one another while retaining sole control.
JPMorgan declined to disclose how many trusts and foundations it has sole control over.
Its creator David Peterson has sole control over the language and any new vocabulary.
In 1853 he obtained sole control of the firm, which was thereafter known as Tiffany & Co.
By that time Joan's mental condition had deteriorated further, and Philip assumed sole control.
Reducing the environmental impact of the media sector is no longer in the sole control of technical decision makers.
Journalists are again in sole control rather than sharing the burden with national team managers and captains.
