Map Viewing Service (WMS) of the dataset: Regulated zone of the PPRT of the Société SDLP — site of the Fief de la Repentie in the commune of La Rochelle in Charente-Maritime.

For PPRTs, the environmental code defines a single category of zones for zones (L515-15 et seq.): areas at risk. Unlike natural RPPs, PPRTs never have restricted areas that are not directly exposed to risk. Depending on the hazard level, each TRPP area is subject to an enforceable settlement. The PPRT regulations generally distinguish two types of zones: 1- ‘Building prohibited areas’, known as ‘red areas’, where the hazard level is high and the general rule is the prohibition on construction; 2- ‘prescribed areas’, known as ‘blue zones’, where the hazard level is average and the projects are subject to requirements adapted to the type of issue. The instructions in the PPRT development guide add a gradation within the “red zones” and “blue zones”.对于技术风险预防计划（PPRT），《环境法典》针对风险区域（L515-15条及后续条款）划定了单一类别：风险区域。与自然风险预防计划（RPP）不同，技术风险预防计划不会包含未直接暴露于风险中的限制区域。 根据危险等级的不同，每个TRPP区域均需遵守可强制执行的管控要求。技术风险预防计划的相关法规通常将区域划分为两类：1. 建筑禁建区（又称“红色区域”）：该区域危险等级较高，通用规则为禁止建设活动；2. 规定管控区（又称“蓝色区域”）：该区域危险等级中等，相关项目需遵循适配于风险类型的管控要求。 技术风险预防计划编制指南中的相关说明，进一步在“红色区域”与“蓝色区域”内部增设了分级机制。