CB证书和报告有效期是几年？是否超过三年即失效？
问：CB证书和报告的有效期是三年吗?是否超过三年即不被认可？答：法律-法规-技术协调标准
IECEE 02:2012 IECEE System of Conformity Assessment Schemes for Electrotechnical Equipment and Components -Rules of Procedure -Part I: Scheme of the IECEE for Mutual Recognition of Test Certificates for Electrotechnical Equipment and Components (CB Scheme)
4.3.4 The NCB may challenge the CB Test Certificate when it is more than three years old or when the standard according to which it was issued is no longer in force in the country of the NCB.
参考译文：
4.3.4当CB测试证书年限超过三年或颁发证书所依据的标准在NCB所在国家/地区不再有效时，NCB可以对CB测试证书提出质疑。
IECEE 02:2018 IEC System of Conformity Assessment Schemes for Electrotechnical Equipment and Components (IECEE System) -Rules of Procedure – CB Scheme -Scheme of the IECEE for Mutual Recognition of Test Certificates for Electrotechnical Equipment and Components (CB Scheme)
4.3.4 The NCB may challenge the CB Test Certificate when the standard according to which it was issued is no longer in force in the country of the NCB.
参考译文：
4.3.4当颁发证书所依据的标准在NCB所在国家/地区不再有效时，NCB可以对CB测试证书提出质疑。
信息来源：https://www.iecee.org/documents/refdocs/downloads/iecee02_ed.18.0.pdf
CQC/07CB0201-2014《CCC认证中认可CB报告/证书的技术要求》
4.认可CB证书的基本原则
6）如果CB证书和报告自颁发之日起（对于变更的证书和报告，从最早的初始证书的日期算起）已超过三年，可提出质疑。
案例分析
根据IECEE的文件，CB证书和报告并没有“有效期”的概念，也没有“CB证书超过三年无效”的说法，而是当证书、报告所依据的标准在NCB所在国家/地区不再有效时，可提出质疑。
以中国NCB对CB证书/报告的认可原则为例，对超过三年的CB证书和报告不是不认可，而是“可提出质疑”。
综上所述，CB证书和报告自颁发之日起超过三年，或者所依据的标准在NCB所在国家/地区不再有效时，各NCB有权提出质疑。
当CB证书/报告对应的产品标准有更新或所依据的产品标准滞后于出口地标准要求时，持证人应及时增加差异测试确保产品符合相应标准的要求。
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