The list of obligations was quite simple. In exchange for the various benefits listed, the human race was required to do 6 major things in exchange.
The first was to be an enforcer of the IUAS, assisting it in carrying out punitive measures on lower-ranked species should they cross the line. A portion of humans who awaken their abilities will be required to take on the job of Galactic Enforcers for a few years, randomly assigned within the species by the Prime Representative office.
The second was that the human race was to contribute their best excavated items from special dungeons opened in the local Essence iteration within the planet to the IUAS for studying and compiling, as well as duplication. This also went for items gained in the actual Chaos Realm, though the original copies will naturally be returned.