. "persons, including nonemployee cargo attendants, other than passengers, and for damage to property, with minimum limits of $300,000 for any one person in any one occurrence, and a total of $20,000,000 per involved aircraft for each occurrence, except that for aircraft of not more than 60 seats or 18,000 pounds maximum payload capacity, carriers need only maintain coverage of $2,000,000 per involve" . . .