Georgecrock : Wellington Rodrigues is the President of the ABCTA , the Brazilian Controllers Association, it is in this function that he was asked to testify to the Parliamentary inquiry. Not as an involved Controller in the collision as your post suggest.
In the extract you posted , he was tring to explain to some senators the difference between a Flight plan with requested FLs and ATC instructions ( clearances ) in some words that the senators would understand.
We all know since the begining that the Legacy was never cleared by ATC to descent to FL360. So nothing really new.
The reasons why he was not cleared to descend are the interesting bits here.