Unless the multiple insertions are contracted in writing in advance, advertisers will be billed at the one-time rate until a different frequency rate is earned. Billing adjustments will be made when a frequency rate changes. Short rates will be issued if fewer insertions are made than were originally contracted. Payment is due within thirty days of the invoice date. MENC employs a collection agency for overdue accounts.
Prepayment is required of all new advertisers.
Camera-ready materials are due fifteen days after the space reservation.