Originally Posted by
TnT
From the Groundspeak guidelines for Earthcaches:
5.2. EarthCache Logging Requirements
An EarthCache must include logging tasks which relate to - and help teach - the Earth Science lesson. The logging tasks should be stringent enough that they can only be completed by cachers who have visited the EarthCache site. Requiring a photograph of the cacher as proof that they were at the EarthCache site is not permitted. However, photographic tasks will be considered if they relate specifically to the Earth Science lesson.
I don't know if photos were allowed in older earthcache listings, but they aren't allowed any more. Chuck Walla would be the one to know if older earthcaches were allowed to retain the photo requirement or if the listings had to be changed.