The photos can be submitted until June 30, 2015.
There are two categories: Snapshot Category (Low-resolution images) and Photographer Category (high-resolution images).
Each participant may not enter more than 5 pictures in total and must include a short description—no more than 150 words—that explains how the image captures a contest theme in one of the three contest languages: Spanish, English, or Portuguese.
Full contest details can be found here.