encoded policy

Hi,
 I've found out a web site whose policy reference file references a policy in gzip fomat. Is it in charge of the user agent implementer to check the content-encoding header and, if it has the features, properly decode it, or not?
Thank you very much.
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Elena Dasseni
Dottore in Informatica
v. Frigia, 27                      
20126 Milano (Italia)
phone: +39-02-25771-390