Mass Effect & Mass Effect 2
Due to the destructive potential of dreadnoughts, the Council races agreed at the Farixen Navel Conference to fix a ratio of dreadnought construction between themselves. At the top of the pyramid is the peacekeeping turian fleet. Below the turian are the other Council races, currently the asari and salarians. Council associate races are at the bottom. The human Systems Alliance is part of this last group.
The ratio of turian to Council associate dreadnoughts is 5:3:1. For every dreadnought humans are permitted to build, the asari have three and the turians five.