"Steven P. McNicoll" wrote:


Where was ambiguity possible?

More than once at my airline a PD descent clearance was issued, then a handoff
subsequently made to another sector. The receiving controller did not know
about the PD clearance.




When there are two options, and there is any doubt as to which is
right (or wrong) exercise the option that has the least cost if wrong.


What is the cost?

See first answer above.