The answer to that question is probably best addressed to the BLM themselves. You should probably contact their Chief Records Officer. I did a quick search online and found this information
Bureau of Land Management - Corey J. Wells
(202) 912-7561 (Office)
I also looked online and found the listing of all the BLM guidance, manuals, and policies at https://www.blm.gov/about/laws-and-regulations. Perhaps the document has been moved to one of these regulations. However I think Mr. Wells is your best best.
Best of luck.