In the mid-17th century the right-bank district of Côte du Rhône had issued regulations to govern the quality of its wine and in 1737 the king ordered that casks of wine shipped from the nearby river port of Roquemaure should be branded with the letters CDR to introduce a system of protecting its origin. The rules for its "Côte du Rhône" thus formed the very early basis of today's nationwide AOC system governed by the INAO. The name was changed to Côtes du Rhône when the left-bank wines were included in the appellation some hundred years later. The appellation received full recognition by a High Court decision in 1937, and the rules were revised in 1996 and 2001 to take into account new conditions of production.