3. The Digital Services Coordinator receiving the request pursuant to paragraph 2 shall comply with such request and inform the Digital Services Coordinator of establishment about the action taken, without undue delay and no later than two months after its receipt, unless:
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(a)
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the scope or the subject matter of the request is not sufficiently specified, justified or proportionate in view of the investigative purposes; or
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(b)
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neither the requested Digital Service Coordinator nor other competent authority or other public authority of that Member State is in possession of the requested information nor can have access to it; or
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(c)
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the request cannot be complied with without infringing Union or national law.
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The Digital Services Coordinator receiving the request shall justify its refusal by submitting a reasoned reply, within the period set out in the first subparagraph.