Nick-Yes it does need to be added to arrival chart MSA(the rule is whenever you operate within 20NM of terrain >2,000'AMSL).
It is actually more important that you apply the correction to approach MSAs as these only give 1,000' separation(Geneva NW spot alt 5,636 give app plate MSA 6,700').Route charts give 1,000' unless the area is defined by the state as mountainous in which case clearance is increased to 2,000'.
Although turbulence caused by mountain waves is not an issue,at light wind speeds,areas of local low pressure can be generated which cause the altimeter to over read.
In Geneva at this time of year you may need to apply an alt temp correction if colder than ISA-15
Good luck-Al
[ 01 January 2002: Message edited by: alosaurus ]</p>