This post is only for a reference in how to create the config file and the command line arguments needed for the Assembly Linker (AL) tool to create the publisher policy file.
For a full reference on how to create a publisher policy file please refer to – http://msdn.microsoft.com/en-us/library/dz32563a.aspx
After creating the config file, you need to compile it into a dll using the Assembly Linker (al) utility as follows.
al /link:publisherPolicyFile /out:publisherPolicyAssemblyFile /keyfile:keyPairFile /platform:processorArchitecture
Load file into GAC