As for developing countries, while they would not have explicit credits or targets until they graduate to advanced-country status, they would know that at some point (say, when their carbon emissions reach the average level of advanced countries) they would be included in the global system of restrictions. This would provide them with an incentive even before that point to make decisions concerning energy pricing and efficiency that would reduce the growth of their emissions without impeding economic growth, and thus extend the period during which their emission levels remain unrestricted.