It depends on the grounds: for remediable deficiencies, a fresh application is usually faster; where the assessment is unlawful, litigation may be unavoidable. The choice should not be made without a diagnosis — and timing constrains it. A sixty-day period for an annulment action in the administrative court runs from notification of the refusal, and a fresh application does not, as a rule, stop that clock. So whichever route you take, the litigation deadline has to be protected separately, running the two in parallel where that is what it takes.
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