The three-party version of GR says "Don't act in a given way toward X and Y without consenting to the idea of this act being done when you imagine yourself in the place of X and also consenting to the idea of this act being done when you imagine yourself in the place of Y."
The three-party version of GR says "Don't act in a given way toward X and Y without consenting to the idea of this act being done when you imagine yourself in the place of X and also consenting to the idea of this act being done when you imagine yourself in the place of Y."
The n-party version of GR would say: "Don't act in a given way without consenting to the idea of this act being done in this kind of situation regardless of where you're placed in the situation."
The three-party version of GR says "Don't act in a given way toward X and Y without consenting to the idea of this act being done when you imagine yourself in the place of X and also consenting to the idea of this act being done when you imagine yourself in the place of Y."