Example:
*ATC*: KLM501 Descend FL200, be level by EPSIL
*KLM501*: (Readback)
*ATC*: KLM501 Continue Descent FL120
So, does KLM501 have to comply the with the previous EPSIL/FL200 restriction ?
As a controller I would definitely restate the restriction by EPSIL, if it's still needed. The "continue descent FL120" clearance could be ambiguous otherwise.
By all means, when in doubt please ask!