Article 4 — Financing

1. The Mechanism shall be endowed with resources made available by: (a) amounts transferred in accordance with Annex XLI to Regulation (EU) No 833/2014, which shall constitute external assigned revenue in accordance with Article 21(5) of the Financial Regulation; and (b) amounts received as financial contributions from Member States, third countries or other sources; such contributions shall constitute external assigned revenue in accordance with Article 21(2), points (a), (d) and (e), respectively, of the Financial Regulation. 2. For all contributions referred to in paragraph 1, point (b), of this Article a contribution agreement shall be concluded between the Commission, on behalf of the Union, and the contributor. The contribution agreement shall contain, in particular, provisions concerning the payment conditions. The Commission shall inform the European Parliament and the Council simultaneously and without delay of the concluded contribution agreements.