There are four forms of request:
(i) N258: request for detailed assessment hearing (general form).
(ii) N258A: request for detailed assessment (legal aid only).
(iii) N258B: request for detailed assessment (costs payable out of a fund other than the Legal Aid Fund).
(iv) N258C: request for detailed assessment hearing pursuant to an order under Part III of the Solicitors Act 1974.
The request should be filed in the District Registry or County Court in which the case was being dealt with when the judgment or order for costs was made or when the event occurred which gave rise to the right to assessment, or to which it has subsequently been transferred; in all other cases the request must be filed in the SCCO (CPR 47.4). Special provisions apply to cases proceeding in the London County Courts (see under the following heading).
In cases in which Form N258 is appropriate, the request should be filed within six months after the judgment, order or event giving rise to the right to costs. In cases in which any of the other three forms of request is appropriate, the request should be filed within three months after the judgment, order or event giving rise to the right to costs. As to the making of agreements or applications for an extension of this time limit, see section 20 (applications).