Enfranchising All Affected Interests, and Its Alternatives

Is that a matter of expressing opinions or of aggregating votes or of deliberating together? (And if "all three," then combined how and in what proportions?) Insofar as it is a matter of aggregating votes, according to what rules? (Simple majority rule or something else?) Insofar as it is a matter of elections, what makes them free and fair? (How are campaigns to be conducted, electors apportioned to districts, and so on?) Are there any substantive constraints on what democracies may or must do? (Respect human rights, for example.) Such questions constitute the warp and the woof of democratic theory. The point remains that the basic rule in international law and public economics is something less than is proposed under the "decisional power" interpretation of the "all affected interests" principle.