'directly under'?

[Abc123]

Hi,

I wonder if the phrase 'directly under' is commonly used. Please consider the following sentences:

1. A split from B and became a city directly under the central government in 1990
2. Company C is directly under the Ministry of National Defence

Thank you very much.
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Please help correct my mistakes whenever you see them. Many thanks :)

[Mister Micawber]

Yes, it is a common phrase when discussing hierarchies.
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Native English teacher at Mister Micawber's