Administrative enforcement refers to the act of citizens, legal persons or other organizations that fail to perform their obligations under the law or the obligations set out in administrative decisions made by administrative agencies in accordance with the law, and the relevant state organs force them to perform their obligations or reach the same status as they perform their obligations. According to the above definitions, which of the following is non-administrative enforcement acts? ["A tax authority closed a merchant's shop that was in arrears of taxes and fees, forcing it to pay taxes.", "A city's people's court auctions the private property of a self-employed individual to ensure the implementation of legal documents related to it.", 'The National Certification and Accreditation Administration officially announced the new compulsory product certification system and enforced it.', 'A court confiscated a police car from the Municipal Public Security Bureau, asking it to compensate the successful party in accordance with legal documents.']