The members of the Science Fiction Poetry Association (SFPA) choose several possible winners (nominees) for each year's Rhysling Awards. Each member may name one work that should win in each category. All of the nominees are published in a book called "The Rhysling Anthology". Members of the Association then vote on the final winners. Since 2005, the Awards have been presented in July at a ceremony at Readercon. The "Best Short Poem" category allows very short poems to be entered. However, the SFPA also has the Dwarf Stars Award for poems from one to ten lines.