Current definitions of the base units, as taken from the Comptes Rendus (CR) of the corresponding CGPM, are here shown indented and in a heavy font. Related decisions which clarify these definitions but are not formally part of them, as taken from the Comptes Rendus (CR) of the corresponding CGPM or the Procès-Verbaux (PV) of the CIPM, are also shown indented in a font of normal weight. The linking text provides historical notes and explanations but is not part of the definitions themselves.