Restricted area of the PPRN of the commune of Chatelaillon-Plage en Charente-Maritime(Litoral risks — coastal erosion and marine submersion)

For natural PPRs, the environmental code defines two categories of zones (L562-1): risk-exposed areas and areas that are not directly exposed to risks but where measures may be foreseen to avoid exacerbating the risk. Depending on the hazard level, each area is subject to an enforceable settlement. Regulations generally distinguish three types of zones: 1- “Building Prohibition Zones”, so-called “Red Zones”, when the hazard level is strong and the general rule is the construction ban; 2- “prescription zones”, known as “blue zones”, where the hazard level is average and projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, structures, development or agricultural, forestry, artisanal, commercial or industrial activities could exacerbate risks or cause new ones subject to prohibitions or requirements (cf. Article L562-1 of the Environmental Code). The latter category applies only to natural PPRs.针对自然风险预防规划（PPR），《环境法典》第L562-1条将区域划分为两类：风险暴露区，以及未直接暴露于风险但可采取相关措施以避免风险加剧的区域。根据危险等级的不同，每类区域均需遵守可强制执行的建设管控要求。法规通常将区域分为三种类型：1. 危险等级较高时，为“建筑禁止区”，亦称“红区”，通用规则为禁止建设；2. 危险等级中等时，为“限制建设区”，亦称“蓝区”，此类区域内的建设项目需遵循适配风险类型的相关要求；3. 未直接暴露于风险，但其中的建设工程、构筑物、开发活动或农业、林业、手工业、商业或工业活动可能加剧风险或引发新风险的区域，需遵守相关禁止性规定或管控要求（参见《环境法典》第L562-1条）。此类区域仅适用于自然风险预防规划（PPR）。