In exchange for the reduced fee, registrants must accept group discounted fees on a “non-refundable” basis only. Substitute registrants are permitted up to the day of the seminar and member/non-member fees will be applied. If the number of cancellations brings the group size down to a lower discount level and a substitute is not available, each registrant will be billed the difference between the discounted rate already paid and the next discount level fee.