Required; found on the Inception tab. In some cases, it may not be possible to determine a fair value for an asset. FAS 13, ¶28, particularly envisions a lease of a part of a building (such as a suite of offices, a floor, or a store space in a mall). In such a case, check this box and leave the Fair Value fields blank. If this box is not checked and nothing is filled into either of the Fair Value fields for a system-classified lease, you will get an error. If this is checked, the classification test (7(d) test in FAS 13) for the present value of the rents is skipped.