As part of the management plan for the Tour du Valat estate, a method for prioritizing heritage responsibility has been defined.

It is based on 6 criteria:

• Heritage value (based on texts / laws): rating from 0 to 4 (low / regional / national / European / global interest)
• Representativeness of the site population: score from 0 to 4.
• Conservation status of the overall population: rating from 0 to 2 (presumed favorable / unfavorable / inadequate / poor).
• Conservation status on site: score from 0 to 2.
• Irreversibility: rating from 0 to 3 (nil, low, medium, high). Equivalent to the probability of recovering the natural heritage element after disappearance.
• Importance of the Camargue (functional site) for the conservation of the species/habitat: score from 0 to 3.

Once these criteria have been scored, they are cross-referenced according to a predefined grid to assess the site’s level of responsibility for the species or habitat concerned.