OFPP, Directives concernant le contrôle périodique d’abris (Directives CPA 2013), ann. 3 ([Internet, 2023-11-24](https://www.babs.admin.ch/content/babs-internet/fr/publikservice/grundlagen/rechtsgrundlagen/_jcr_content/contentPar/downloadlist_copy/downloadItems/389_1461570842839.download/WegltgPSK-2013-fr.doc))