Prevent auto creation of service entry sheet

Dear friends,

I am using maint plan for creating service entry sheets automatically. I am using framework order where I give the validity period. Now when I try to generate service entry sheets through the plans after the end of validity period given in framework order,the system is allowing creation of service entry sheets. Is it possible to prevent a maint plan triggering a service entry sheet if the call date for the service entry sheet to be generated falls outside the validity period given in framework order.

best regds

Arun