Why do we not use only which in the following phrase instead of under which?
an arrangement between a bank and a customer under which the customer pay in and take out money
e. the arrangement permits payments and withdrawals to take place). Without "under" it is not possible, seeming to mean that the customer "pays in and takes out money the arrangement", which is ungrammatical.
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an arrangement between a bank and a customer under which the customer pays in and takes out money
"under" is used because the customer pays in and takes out money under the arrangement (i.e. the arrangement permits payments and withdrawals to take place). Without "under" it is not possible, seeming to mean that the customer "pays in and takes out money the arr