Secondary documentary evidence becomes admissible on specified grounds, with permissible form varying for admissions, public records, and voluminous documents.

Secondary evidence may be admitted where an original is unavailable after required notice, has been lost or destroyed without fault, cannot readily be moved, or where its contents are admitted in writing. The admissible form varies by circumstance: written admissions are admissible for admitted contents; only certified copies may prove public documents or documents legally provable by certified copy; and a skilled examiner may prove the general result of numerous documents that cannot conveniently be examined.

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