TITLE I - General principles Art. 80 - (Fundamental principles) Art. 81 - (Priority duties of the state) Art. 82 - (Sectors of ownership of the means of production) Art. 83 - (Requisites for compulsory purchase) Art. 84 - (Public domain) Art. 85 - (Cooperatives and worker-management experiments) Art. 86 - (Private enterprises) Art. 87 - (Foreign economic activity and investment) Art. 88 - (Abandoned means of production) Art. 89 - (Worker participation in management) TITLE II - Plans Art. 90 - (Objectives of plans) Art. 91 - (Drawing up and implementation of plans) Art. 92 - (Economic and Social Council) TITLE III - Agricultural, commercial and industrial policies Art. 93 - (Agricultural policy objectives) Art. 94 - (Elimination of very large estates) Art. 95 - (Resizing of small farms) Art. 96 - (Forms of use of non-owned land) Art. 97 - (State assistance) Art. 98 - (Participation in defining the agricultural policy) Art. 99 - (Commercial policy objectives) Art. 100 - (Industrial policy objectives) TITLE IV - Financial and fiscal system Art. 101 - (Financial system) Art. 102 - (Bank of Portugal) Art. 103 - (Fiscal system) Art. 104 - (Taxes) Art. 105 - (Budget) Art. 106 - (Drawing up the Budget) Art. 107 - (Scrutiny) PART III - Organisation of political power TITLE I - General principles Art. 108 - (Source and exercise of power) Art. 109 - (Citizens’ participation in politics) Art. 110 - (Entities that exercise sovereignty) Art. 111 - (Separation and interdependence) Art. 112 - (Normative acts) Art. 113 - (General principles of electoral law) Art. 114 - (Political parties and right of opposition) Art. 115 - (Referenda) Art. 116 - (Collegial organs) Art. 117 - (Statutes governing political officeholders) Art. 118 - (Renewal principle) Art. 119 - (Publicising of acts) TITLE II - President of the Republic