Essential derivation (EDV) is a technical concept
Dependency which could result from essential derivation is a legal concept
The definition of EDV is generic, covering a wide range of situations across species
The paragraphs consider respectively the origin of the EDV, its distinctness and its conformity to the initial variety
EDV refers to essential characteristics which are not necessarily those use to establish distinctness
A variety can be an EDV from any variety but dependent only from the initial one