http://www.ietf.org/internet-drafts/draft-morris-geopriv-core-01.txt

 Element D:  Permission to disclose only to specified individual 
                  or entity 
       
      Element E:  Permission to disclose only to someone presenting a 
                  specified key (for instance, a shared key or the 
                  private key corresponding to a particular public 
                  key), or a special type of credential (an e-token to 
                  be defined). 
       
      Element F:  Requirement that the granularity/precision of 
                  location information be reduced 
       
      Element G:  The ability to provide additional Privacy Rules for 
                  specific requestors or groups of requestors 
       
      Element H:  The ability to define a time until which a permission 
                  is valid 
       
      Element I:  The ability to define a geographical area for which 
                  the permission is valid ("if I am in area x then you 
                  can tell y my location") 
       
      Element J:  The ability to define a repeatable time window (such 
                  as weekdays during office hours) during which a 
                  permission is valid 
       
      Element K:  The ability to require that express consent of the 
                  Target/Rule Maker be obtained prior to disclosing 
                  location 
       
      Element L:  The ability to require that notice be provided to the 
                  Target if location is provided 

NENA

http://www.nena.org/9-1-1TechStandards/Standards_PDF/NENA%2002-010.PDF
Version 4.0


Q.763 geographic datum