Technical standards like 21681 are frequently updated; ensure you have the version currently in effect (e.g., the 2026 IATA guidance).

If your search is related to modern shipping or logistics, "21681" may be a mistyped or specific subsection of the .

The 2026 edition is the latest for the 67th Edition of the IATA Dangerous Goods Regulations (DGR).

The identifier most commonly refers to a specific United States Federal Register document from 1995 or is part of broader regulatory guidance regarding the transport of hazardous materials. Option 1: Federal Register Document (1995)

You can find the official PDF through GovInfo or the Federal Register archive. Option 2: IATA Lithium Battery Guidance

If "21681" alone yields too many results, search for the specific agency (e.g., "FAA 21681 PDF"). Battery guidance document - IATA