Pure Practical Reason and Law

Kant's Pure Practical Reason can also be characterized as Legislative Reason or Legislative Will.  For, according to him, it is the faculty that creates Laws--not merely edicts, but formulations that qualify as Laws by entailing Universality, the fundamental characteristic of a Law.  Now, in his system, Pure Practical Reason functions primarily as the basis of Morality, as a vehicle of an Individual's transcendence of external influences.  But, it is also potentially relevant to Political Philosophy.  For, its concept of Universalizability offers a criterion for weeding out any partisanship from presumably egalitarian legislative processes.