The procedure for the UPSC exam re-evaluation process involves candidates submitting a formal request along with the requisite fee after results are declared. The request can be made for any specific paper or papers in the mains examination. However, re-evaluation pertains only to the assessment of answer scripts; it does not guarantee a change in scores or ranks, as the UPSC follows strict evaluation guidelines. Candidates should ensure that requests are made within the stipulated time, adhering to all prescribed procedures outlined by the commission.