Final answer:
The question pertains to the business practice of renewing a membership or license and incurs a late fee if not done within a specified time frame. Exact dates cannot be provided without further context.
Step-by-step explanation:
The statement refers to a timeline for renewal fees, which is typically associated with business practices or administrative procedures rather than academic subjects. The appropriate dates that should fill the blanks would be determined by the specific guidelines or rules of the organization or agency managing the renewals. Without additional context, it is not possible to specify which dates should be inserted. However, in general, this type of statement is part of a notice or policy that informs individuals of the deadline to renew a membership, subscription, license, or similar commitment without incurring a late fee. Missing this deadline would lead to an additional charge on top of the standard renewal fee.