CentOS - Apr 2006 - Update among protected repos (with yum-protectbase-plugin)

Hello,
>From http://wiki.linux.duke.edu/YumPlugins
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This plugin allows certain repositories to be protected. Packages in the
protected repositories can't be overridden by packages in non-protected
repositories even if the non-protected repo has a later version.
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But jumps a doubt to me, can be updated packages among different
protected repos?

Suppose you have 2 protected repos A and B. First you install package
pkg-N.rpm from repo A, then in repo B there is an update to the
pkg-N.rpm which you installed from repo A. Is this update permitted?

Greetings