Justice Manual § 5-15.533

The evidence of title must be continued to a date subsequent to the recordation of the lis pendens or declaration of taking. On the basis of information, if any, disclosed by the continuation of the evidence of title, and the certificate of inspection and possession (see JM 5-15.536), any additional parties shown by the continuation to have, or who may claim to have, any interest in the estate taken must be joined as defendants in the case, and any changes in the naming of necessary and proper parties defendant must be effected. The procedure for adding, dropping, or substituting parties is by motion and order under Fed. R. Civ. P. 21 and 71.1(g) and (i). An amended complaint need not be filed. Detailed instructions with respect to continuing title evidence are set forth in the ENRD Resource Manual at 7 and in the Regulations of the Attorney General Governing the Review and Approval of Title for Federal Land Acquisitions (2016).