Define direct effect.

The definition: 1. A norm is directly enforceable (it needs no further implementation by legislature but can be directly applied by the executive or the courts) 2. It binds the national legislator, but the norm is not self-executing 3. A difference: - Direct applicability: refers to the internal effect of a EU norm within legal orders - Direct effect: refers to the enforceable effect of such a norm in a specific case 4. Direct effect ONLY relates to the executive and judicial branch