Legal Analysis: According to the General Principles of Judicial Appraisal Procedure of the Ministry of Justice, the judicial appraisal institution shall complete the appraisal within 30 working days from the effective date of the Judicial Appraisal Power of Attorney. Identification matters involving complex, difficult, special technical problems or the identification process takes a long time, with the approval of the person in charge of the institution, the time limit for completing the identification can be extended, and the extension time limit shall generally not exceed 30 working days. If the appraisal period is extended, the client shall be informed in time. But generally speaking, trace identification, speed measurement and brake system identification should be completed within one week. The accident liability confirmation shall be issued within 10 days, but if the situation is complicated and the accident is serious, it shall be extended by about 10 days.

Legal basis: Road Traffic Safety Law of the People's Republic of China.

Article 72 After receiving the traffic accident alarm, the traffic administrative department of the public security organ shall immediately send traffic police to the scene, first organize the rescue of the injured and take measures to restore traffic as soon as possible. The traffic police shall conduct an inquest and inspection on the scene of the traffic accident and collect evidence; Due to the need of collecting evidence, the accident vehicle may be detained, but it shall be properly kept for verification. The traffic administrative department of the public security organ shall entrust a specialized agency to conduct a professional inspection of the physical and mental condition of the parties. The appraisal conclusion shall be signed by the appraiser.

Article 73 The traffic administrative department of the public security organ shall, according to the on-site inspection, inspection and investigation of traffic accidents and the conclusions of relevant inspection and appraisal, make a traffic accident identification in time as evidence for handling traffic accidents. The traffic accident certificate shall state the basic facts, reasons and the responsibilities of the parties, and shall be served on the parties.