A high-level policy that defines an organization's commitment to digital preservation is an essential component of an effective and sustainable program.  here are some examples:

• A proposed model digital preseration policy framework document:
• ICPSR http://www.icpsr.umich.edu/DP/policies/dpp-framework.html 
• Cornell University Library http://commondepository.library.cornell.edu/cul-dp-framework.pdf 
• Library and Archives of Canada http://www.collectionscanada.gc.ca/digital-initiatives/012018-2000.01-e.html  
• JISC-sponsored report on digital preseration policies: http://www.jisc.ac.uk/whatwedo/programmes/preservation/2008digprespolicystudy.aspx