# French local authorities biodiversity summit boycott

> Live situation record from CLSTR: https://clstr.news/situations/french-local-authorities-biodiversity-summit-boycott
> Updated: 2026-09-27T14:29:26.000Z. Sources: 5. Developments: 2.

The association Départements de France has announced a boycott of the 2026 Biodiversity Summits (Assises de la biodiversité) and the National Summits for Sensitive Natural Areas. Led by president François Sauvadet, local officials are protesting significant revenue losses linked to the ‘taxe d’aménagement’ (development tax).

Representatives claim that administrative malfunctions following the 2022 transfer of urban tax liquidation to the Direction générale des finances publiques (DGFiP) have resulted in the loss of hundreds of millions of euros. Officials describe the situation as a ‘scandal,’ noting that these funds are essential for managing over 4,300 sensitive natural areas covering approximately 400,000 hectares, as well as supporting architecture, urbanism, and environment councils (CAUE).

## Timeline

### 2026-09-27: Local authorities protest funding losses and budget cuts

French departments are boycotting biodiversity summits over lost tax revenues, while Lancy residents in Switzerland voted to reject proposed 2026 budget cuts for social and mobility subsidies.

2 sources. https://clstr.news/cluster/local-authorities-protest-funding-losses-and-budget-cuts

### 2026-09-24: Départements de France to boycott 2026 Biodiversity Summits

French departments will boycott the 2026 Biodiversity Summits to protest significant revenue losses in development taxes used to fund local nature protection.

3 sources. https://clstr.news/cluster/dpartements-de-france-to-boycott-2026-biodiversity-summits

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Cite as: French local authorities biodiversity summit boycott. CLSTR, https://clstr.news/situations/french-local-authorities-biodiversity-summit-boycott