You must obtain prior written approval from the NHPRC for most changes in the grant project and terms of the grant. Detailed instructions are found in How to Administer an NHPRC Grant available at http://www.archives.gov/NHPRC or from the NHPRC staff. [71 FR 27624, May 12, 2006, as amended at 75 FR 66319, Oct. 28, 2010]