The pens that everyone took to sign were specially made with mana infused ink. This was a magic contract that would bind them all together. No one would be able to violate these laws and if they did they would need to suffer appropriate consequences.
"For a reminder. We will help each other in freeing the demon people from their oppressors and clan the corruption. They will be allowed to join us and thrive as well. Any sentient monster that becomes a race will be welcomed. Until that point, they may come for assistance in becoming a race. We are all equal here and no matter your status in your own kingdom you will not be exempt from any laws."
The statement had already been agreed upon but Walker felt that reiterating it while the signed was the right thing to do. Their signatures glowed and every single member of the party signed. Onyx and Midnight used a small stamp on their adventurers' guild plaque to mark their signature as well.