  Once the determinatio is validly made, fulfilling the criteria of validity provided by or under the relevant legal system’s constitutional law, it changes the pre-existing state of the law by introducing a new or amended legal rule and proposition(s) of law. The new or amended legal rule gives judges, other officials, and citizens a new or amended reason for action (or forbearance). The fact that the new or amended rule depends upon the social-fact source constituted or employed by the act of determinatio does not entail that a normative reason (an “ought”) is being illogically derived from a bare fact (an “is”). Rather, the new or amended rule is normative, directive and (where that is its legal meaning ) obligatory because that social fact can be the second premise in a practical syllogism whose first premise is normative: “there ought to be a maternity hospital in this town,” “people ought to be protected against homicidal assault,” “people ought to be required to contribute to the public expenses of appropriate governmental functions”, “victims of assault, theft, broken contracts, negligence, etc., ought to be compensated,” “road traffic should be regulated to reduce damaging collisions,” and so forth. The moral normativity of the principle is replicated in the more specified rule created by the determinatio, even though the latter is not an entailment of the former. 