The measure will be implemented by the following operators, in accordance with their strategic intervention or management guidelines: water agencies, French Office for Biodiversity (OFB) for the needs of the marine nature parks it manages and benefit of third parties responding to these calls for projects, national parks, Conservatory of the coastal area and lake shores, Center for studies and expertise on risks, the environment, mobility and planning (CEREMA), as well as by decentralized State services (for the benefit of third parties or on State infrastructure or works). Credits will be delegated to operators and decentralized services in early 2021. The actions that make up the measure are as follows: