This "14 Cfr Part 91 (Docket No. Faa-2014-0396), Interpretation of the Special Rule for Model Aircraft" is a part of the paperwork released by the U.S. Department of Transportation - Federal Aviation Administration specifically for United States residents.
The latest fillable version of the document was released on June 18, 2014 and can be downloaded through the link below or found through the department's forms library.
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