I: MANDATORY NORMS : PRINCIPLES AND RULES.- 1. Introduction. Types of principles.- 2. Principles and rules.- 3. The explanatory, the justificatory and the legitimatory dimension of principles.- APPENDIX TO CHAPTER I: REPLY TO OUR CRITICS.- 1. Mandatory rules as peremptory reasons, and principles as non-peremptory reasons; the 'closed' or 'open' configuration of the conditions of application.- 2. Principles and full compliance.- II: POWER-CONFERRING RULES.- 1. Introduction.- 2. What power-conferring rules are not.- 3. What power-conferring rules are.- APPENDIX TO CHAPTER II: REPLY TO OUR CRITICS.- 1. Introduction.- 2. Critique of our critique of the deontic (or prescriptivist) conception.- 3. Are we treating the conceptualist thesis fairly?.- 4. Problems with our conception.- III: PERMISSIVE SENTENCES.- 1. Permission in contemporary legal theory.- 2. Reformulating the problem.- 3. Some conclusions.- APPENDIX TO CHAPTER III: A NOTE ON CONSTITUTIONAL PERMISSION AND BASIC RIGHTS.- IV: VALUES IN THE LAW.- 1. Introduction.- 2. Two conceptions of criminal norms.- 3. The double-faced character of norms and value judgments.- 4. Types of norms and types of values.- V: THE RULE OF RECOGNITION.- 1. Introduction.- 2. Jurists and the 'normative value' of the constitution.- 3. The rule of recognition as ultimate norm.- 4. Changing the rule of recognition without rupturing legal continuity?.- 5. A host of problems.- 6. Who shapes the rule of recognition?.- 7. The conceptual, directive and evaluative dimensions of the rule of recognition. The rule of recognition and the exclusionary claim of the law. Why accept the rule of recognition?.- 8. How many rules of recognition? Certainty and penumbra in the rule of recognition.- VI: CONCLUSIONS.- 1. Introduction.- 2. Aclassification of legal sentences: Table 1.- 3. A comparative analysis of the different types of sentences: Table 2.- TABLE I. CLASSIFICATION OF SENTENCES.- TABLE II. COMPARATIVE ANALYSIS OF DIFFERENT TYPES OF SENTENCE.- INDEX OF NAMES.