43 C.F.R. § 2568.100 What is a CSU?
Title 43 - Public Lands: Interior
A CSU is an Alaska unit of the National Park System, National Wildlife Refuge System, National Wild and Scenic Rivers System, National Trails System, National Wilderness Preservation System, or a National Forest Monument.
Title 43: Public Lands: Interior
PART 2560—ALASKA OCCUPANCY AND USE
Subpart 2568—Alaska Native Allotments For Certain Veterans
Available Lands—Conservation System Units (CSU)
§ 2568.100 What is a CSU?

