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Is this correct?


On April 4, 2019, Big3 announced a new broadcast deal with CBS Sports , under which coverage moved to CBS and CBS Sports Network .


I don’t see why « under which » is being used.

Could you tell me if « of which » is better?


thanks

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Under the terms of the deal, the coverage moved to CBS.

That's where "under" comes from.

... announced the deal, under which the coverage moved to CBS.
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anonymousCould you tell me if « of which » is better?

No. 'under' is correct.

There is a special meaning of 'under' that we see less often. It can mean

as provided for by the rules of; in accordance with.

Here are examples that show the typical kinds of words that follow 'under' when it has this meaning. In your sentence it's 'under a deal' ~ 'as provided for by the rules of the deal'.

under the planning laws
under the terms of release
free to sell water under contract
the first arrest under the new powers
access to UK data under the mutual assistance treaties

CJ