Passage: "Not every document needs to be kept forever. Government offices follow records disposition schedules that state how long each type of record must be kept. Records with lasting value, such as land titles and civil registry documents, are kept permanently, while routine papers like visitor logs may be disposed of after a set period with proper approval. Keeping everything is not the safe choice it seems: crowded storage rooms make important files harder to find and more likely to be damaged by fire or flood." According to the passage, which records are kept permanently?