CFR /  Title 40  /  Part 35  /  Sec. 35.4115 After the public notice that EPA has received an LOI, separate LOI?

Your group has 30 days (from the date the public notice appears in your local newspaper) to submit documentation that you have formed a coalition with the first group and any other groups, or to submit a separate LOI. This 30-day period is the first 30 days with which your group must be concerned.