I think you're misreading the statute, Frank. It doesn't say "before 60 days of the date of arrival"; it says "within 60 days of the date of arrival." Normal rules of statutory construction apply. "Within" means that starting on the day of arrival, count 60 days into the future. By the end of that 60 day period, the pilot is required to register and pay an initial fee of $24. Later the statute says that by the anniversary of that first arrival, the pilot is to pay $48, which is good for 2 more years, and on and on.
Cary