The National Academy of Recording Arts and Sciences
and record companies are responsible for entering into nomination the works that they deem most deserving. Once a work is entered, reviewing sessions are held by over 150 experts from the recording industry. This is done only to determine whether or not a work is eligible or entered into the proper category for official nomination. The nomination process requires that members vote only in their fields of expertise. They may nominate in the four general categories (Record of the Year
, Album of the Year
, Song of the Year
and Best New Artist
) and in no more than nine out of 31 fields on their ballots. Once the nominations are secured, Recording Academy members may then vote in the four general categories and in no more than eight of the 31 fields. Ballots are tabulated secretly by the major independent accounting firm Deloitte Touche Tohmatsu
As of 2006, the eligibility period for the Grammy Awards begins October 1.