In earlier deliberation by the Federal Accounting Standards Advisory Board (FASAB) on Property, Plant, and Equipment (SFFAS No. 6) and Supplementary Stewardship Reporting (SFFAS No. 8), the land was defined as the solid part of the surface of the earth. For the purpose of those standards, natural resources that are in the custody of the Federal Government were excluded from the scope of the land project. The major reasons for addressing only surface land in the previous standards were: (1) the allotted time frame within which to complete the standard for land; (2) studies that pointed out the difficulties and complexities of accurately estimating and valuing natural resources; and (3) disputes regarding the boundaries of the outer-continental shelf.