X9。131-2015定义了一套通用的应用程序编程接口（API）函数，用于在零售商环境中访问集成电路（智能）卡上的WIC好处；识别智能卡上存在的WIC EBT福利和WIC EBT方案的发行人的常用方法（卡发现机制），以及与读卡器设备的接口，用于从WIC EBT智能卡发送和接收数据。WIC国家机构提供的参考或模型实施应使用本标准。本标准未规定零售商应用程序使用的读卡器驱动程序，但定义了可用于WIC模块访问读卡器驱动程序模块（RDM）功能的接口。 集成电路（智能）卡读卡器驱动程序接口的具体要求取决于WIC国家机构选择的卡设计，可以从中获得。

X9.131-2015 defines a common set of Application Programming Interface (API) functions to access the WIC benefits on an integrated circuit (smart) card in the retailer environment; a common method (card discovery mechanism) to identify the issuer of the WIC EBT benefits and the WIC EBT scheme present on the smart card and, an interface to the card reader device that transmits and receives data from the WIC EBT smart card. The reference or model implementation provided by the WIC State Agency shall utilize this standard. This standard does not specify the reader driver used by the retailer application but it defines interfaces that may be implemented for the WIC module to access functions of the Reader Driver Module (RDM). The specific requirements of the Reader Driver Interface to the integrated circuit (smart) card are dependent on the card design chosen by the WIC State Agency and may be obtained from them.