Context from the opening of Chapter I of Book I from the Critique of Practical Reason. The opening of that chapter begins with a "Definition", 5:19
Practical principles are propositions that contain a general determination of the will, having under it several practical rules.
What does "general determination" mean here? What is "contained" within practical principles? Practical rules? If so, is Kant saying that the will is founded/based/conditioned upon practical rules?