That causes other problems, like overhead and privacy invasions required to determine the fee. Better to have a cliff: * When you are obviously under some min

That causes other problems, like overhead and privacy invasions required to determine the fee. Better to have a cliff: * When you are obviously under some minimum, regulation does not apply. * When you appear to be near the cliff or over, the regulation applies (or you have to do the paperwork to show that the regulation does not apply). This practice works well for many regulations, including most business regulations with small-business exemptions, Alternative Minimum Tax, checking ID for buying alcohol, etc.