Shadow Proclamation

The Shadow Proclamation are most likely a group or organisation. They and the treaty were mentioned before in Rose (TV story) and The Christmas Invasion.

the shadow proclamation treaty. (the namesake of its founders and enforcers)

the treaty allows one party to seek an audience with another under peaceful contract. also under the proclamtion seeding of Level 5 planets is prohibited. This meant that Miss Foster was breaking the proclamation by seeding the Adipose on Earth. (A level 5 planet) (DW:Partners in Crime)