Trust settings via the “security” command

I am making a package to to add some certificates to the X509Anchors keychain, and would like to automatically set them to "Always Trust". Is there a way to set the trust settings for a certificate via the command line? The security command seems to only handle importing the cert into the keychain, but does not allow you to set the trust levels. I am using the following command: security add-trusted-cert -d -k "$3"/System/Library/Keychains/X509Anchors "$3"/private/tmp/JHUAPL_Certs/JHUAPLCert.cer That command adds the cert, but it is set to "Never Trust". The man page touches on trust settings a bit, but I can't seem make it work.