Regulated zone of the Marignier natural hazard prevention plan (Haute-Savoie) — approved on 18/11/1991

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 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; 3- areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, craft, 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.针对自然风险防护区（PPRs），《环境法典》第L562-1条划定了两类区域：风险暴露区域，以及虽未直接面临风险但可通过预先采取措施规避风险加剧的区域。 依据危险等级，每类区域均需遵循可强制执行的管控要求。相关法规通常将区域划分为三类： 1. 建筑禁止区（又称"红色区域"）：该区域危险等级较高，通用规则为禁止任何建筑活动； 2. 指定管控区（又称"蓝色区域"）：该区域危险等级中等，相关工程建设需遵循适配风险类型的管控要求； 3. 非直接风险暴露区：该区域虽未直接面临风险，但任何建筑、工程、开发活动，以及农业、林业、手工业、商业或工业类经营场所均可能加剧既有风险或引发新风险，因此需遵守相关禁止性规定或管控要求（详见《环境法典》第L562-1条）。此类区域仅适用于自然风险响应防护区（RPPs）。