[theme-reviewers] Help on theme review - Did I waste my time?

[Diana K. Cury]

Please, someone could clarify http://themes.trac.wordpress.org/ticket/4032

I'm not undertanding this:
    Even though there are a few changes to be made I cannot approve this theme because of the implementation of custom post types which is required to be implemented as a plugin. (...)

Where, who said that post types should be implemented only as a plugin, if so, why anyone said me tha before I re-submit the theme ten times? 

Also, that stands for a built in plugin or a standalone one (submit as a plugin in Plugin Directory)?

Thanks,
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