Beginning with the 2009 awards, the rules were changed to the current format, and nominated works must have been published during that calendar year. Prior to then, the eligibility period for nominations was defined as being one year after the publication date of the work, which allowed the possibility for works to be "nominated" in the calendar year after their publication, and then be "awarded" in the calendar year after that. Under the previous process, works were added to a preliminary list for the year if they had ten or more nominations, which were then voted on to create a final ballot, to which the SFWA organizing panel was also allowed to add an additional work if they felt it was overlooked.