Group: From (t)here to ipernity

Coming over from flickr I found here in ipernity reference to a system to rate the content one uploads.

According to; By Team ipernity '[EN] Introducing the new content rating/filtering system' June 18, 2010 (www.ipernity.com/blog/11832/243059):
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"....Content rating
All documents and articles will be rated by their owners according to their intended audience. This rating system will be coupled with content filters (see above) to allow users to protect themselves from inappropriate content.
Rating will be done when uploading docs or writing an article. Members will be able to define a default category in their preferences.
Docs and articles published before the release of this system have been arbitrarily rated by the ipernity moderation team. Once the rating system active, members will be invited to review their contents and make any adjustments.
Here are the 3 content categories:
All audiences
This category includes all content suitable for a global audience with parental guidance and might be aired on TV to primetime. In case of doubts, this category must not be chosen.
Not for all audiences
Everything that cannot be "All audiences"-rated but that isn't necessarily restricted to adults (18+) should be rated in this category. This kind of content is not suitable for children and may offend some people.
Restricted to adults (18+)
Every not prohibited content that is forbidden to minors (-18) or that can not otherwise rated should be "Restricted to Adults (18+)"."
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. As much of my content will be art (paintings sketches, etc.) and some of my works include nudes I want to be sure I follow the community guidelines for this site. However I can not find any way to apply this rating system to either my uploads from my computer nor my transfers from Flickr.

Any suggestions?

Jim