Key legal question
Whether the departmental letter created a binding administrative contract and vested hunting rights.
Extracted holding
No binding administrative contract or vested right arose; the promise was too vague and could not lawfully restrict future regulatory power.
Extracted reasoning
A hunting reserve is created by regulation under the cantonal fauna law. The executive could not bind itself in advance to refrain from using its regulatory power. The alleged agreement lacked essential terms and appeared to exchange unrelated benefits, which undermined any contractual effect.