She had found it. The crucial document that would make everything clear. She closed her eyes for a moment, letting out a long breath, and clicked 'Send' to her team.

If you can clarify "lis arb0412" is (e.g., land arbitration, legal file, technical standard), I may be able to help you locate the specific, official source for that PDF.

LIS , she thought. Land Information System? Legal Information Services?