Article 104a: Apportionment of expenditures – Financial system – Liability
(1) The Federation and the Länder shall separately finance the expenditures resulting from the discharge of their respective responsibilities insofar as this Basic Law does not otherwise provide.
(2) Where the Länder act on federal commission, the Federation shall finance the resulting expenditures.
(3) Federal laws providing for money grants to be administered by the Länder may provide that the Federation shall pay for such grants wholly or in part. If any such law provides that the Federation shall finance one half or more of the expenditure, it shall be executed by the Länder on federal commission.
(4) Federal laws that oblige the Länder to provide money grants, benefits in kind or comparable services to third persons and which are executed by the Länder in their own right or according to the second sentence of paragraph (3) on commission of the Federation shall require the consent of the Bundesrat if the expenditure resulting therefrom shall be borne by the Länder.
(5) The Federation and the Länder shall finance the administrative expenditures incurred by their respective authorities and shall be responsible to one another for ensuring proper administration. Details shall be regulated by a federal law requiring the consent of the Bundesrat.
(6) In accord with the internal allocation of competencies and responsibilities, the Federation and the Länder shall bear the costs entailed by a violation of obligations incumbent on Germany under supranational or international law. In cases of financial corrections by the European Union with effect transcending one specific Land, the Federation and the Länder shall bear such costs at a ratio of 15 to 85. In such cases, the Länder as a whole shall be responsible in solidarity for 35 per cent of the total burden according to a general formula; 50 per cent of the total burden shall be borne by those Länder which have caused the encumbrance, adjusted to the size of the amount of the financial means received. Details shall be regulated by a federal law requiring the consent of the Bundesrat.