Allow request submittal after appointment StartTime has begun
Many reading rooms allow request submittal after the appointment time starts. If the Appointment mindleaddays is set to 0, this should allow the user to submit requests until the appointment StopTime.
Alternately, if lead time is required, add a new key to indicate whether requests can be submitted while the user is signed in for their appointment.
Hillel Arnold commented
This is essential for sites that have longer appointment times in order to allow patrons to adjust their research strategy based on what they are learning and how quickly they learn it.