La Chartre PRMP Regulated Area on the Loir en Sarthe.

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 can be foreseen to avoid exacerbating the risk.Depending on the hazard level, each area is subject to an enforceable settlement. The regulations generally distinguish three types of areas:1- ‘Building prohibited areas’, so-called ‘red areas’, where the hazard level is high and the general rule is the construction ban;2- ‘prescription areas’, known as ‘blue zones’, where the hazard level is medium and projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, crafts, commercial or industrial could aggravate 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 RPPs.针对自然风险预防计划（Natural PPRs），《环境法典（Environmental Code）》第L562-1条划定了两类区域：一是风险暴露区域，二是未直接面临风险但可通过预先采取措施避免风险加剧的区域。根据危险等级的不同，每类区域均需遵循可强制执行的处置要求。相关法规通常将区域划分为三类：1. 建筑禁止区域（又称"红色区域"）：此类区域危险等级较高，原则上实施建设禁令；2. 合规管控区域（又称"蓝色区域"）：此类区域危险等级为中等，建设项目需遵循适配问题类型的合规要求；3. 非直接风险暴露区域：此类区域未直接面临风险，但区内的各类建设、工程、开发活动或农业、林业、手工业、商业及工业类经营场所可能加剧既有风险或引发新的风险，因此需遵守相关禁止性规定或合规要求（详见《环境法典》第L562-1条）。上述第三类区域仅适用于自然风险预防计划（Natural RPPs）。