As of August 2016, there are 413 official units of the National Park System. However, this number can be misleading. For example, Denali National Park and Preserve are counted as two units, since the same name applies to a national park and an adjacent national preserve. Yet Jean Lafitte National Historical Park and Preserve is counted as one unit, despite its double designation. Counting methodology is rooted in the language of a park's enabling legislation. Elsewhere, Fort Moultrie National Monument is not counted as a separate unit because it is considered a feature of the larger Fort Sumter National Monument. Furthermore, the NPS contributes resources to "affiliated areas" which do not fall under its administration, and these do not count toward the official list number. An example is