VATPAC Tutorial: CLIMB VIA SID / DESCEND VIA STAR
CLIMB VIA SID TO (Level) (AIP ENR 3.4-5.12)
This instruction means the aircraft may climb to the assigned level, while:
a) complying with published level restrictions,
b) following the lateral profile of the SID and,
c) complying with published speed restrictions and ATC issued speed restrictions.
These published speed restrictions can be read from the chart applicable to the assigned SID.
It is important to note, that when instructed as part of your clearance to "CLIMB VIA SID TO 5000", you should set your autopilot to 5000ft so as to not find yourself flying through this level. The initially cleared level is an important factor in ensuring separation between arriving and departing aircraft.
Procedures for cancellation of these restrictions are too numerous to mention here. Review the applicable AIP section (GEN 3.4 5.12) for more information.
DESCEND VIA STAR TO (Level)
Same as above, only going the other way.