smtp-vilter + spamassassin Subject header rewrites

[Joel Gudknecht]

Does the smtp-vilter.conf line "spam-subject-prefix=*SPAM*" override
spamassassins "rewrite_header subject ***SPAM***" (from
/etc/mail/spamassassin/local.cf) because I never see the subject being
modified by spamassassin?

Thanks,
-JG