Definitions of directive
a type of legislation passed by the European Parliament and the Council of the European Union and binding on EU member states; the mutually binding collective decision made by the EU member states, acting through their national Government Ministers in the Council of the European Union and the Parliament
The directive must be implemented by EU member states no later than September 2009.
instructions, guidelines, decisions, rules and regulations etc issued by an official body that outline how to perform an action or to reach a target. These may or may not be binding.
The city of Houston issued a directive to conserve energy supplies.