US federal agencies approve PDF/A
September 2, 2016
US agencies have released updated guidelines on digitizing books and other materials.

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The US Government's Federal Agencies Digital Guidelines Initiative (FADGI) has released its latest Technical Guidelines for Digitizing Cultural Heritage Materials: Creation of Raster Image Files.
These guidelines provide federal agencies with formal guidance on digitizing books and unbound materials.
As of the September, 2016 edition of the Guidelines, PDF/A is recognized as the preferred master file format for such digitization efforts.
FADGI's index of acceptable file-formats has also been updated.
Source Link: http://www.digitizationguidelines.gov/guidelines/FADGI_Still_Image_Tech_Guidelines_2016.pdf