http://danbooru.donmai.us/wiki_pages/3642
It says "THE TAG IS NOT VIABLE IF THE IMAGE SHOWS PANTIES/SIMILAR UNDERWEAR OR GENITALIA BETWEEN THE THIGHHIGHS AND SKIRT."
Does this mean most upskirt posts should not have this tag?
If so then all of the examples given in the wiki should not have the tag as they show panties/swimwear/genitalia between the thighhighs and the skirt.
Also, "zettai_ryouiki 1girl shorts" returns 3 pages of results. (Just saying.)
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[Head palms] Okay, I read that all wrong. I missed the "does not meet the tag criteria" part and I feel dumb for posting this.
Also "zettai_ryouiki panties 1girl" returns 17 pages. (Just saying.)
Updated