It looks like the ADG is following suit with a similar move made by the costumers last year.

The official press release:

LOS ANGELES, July 17 -- The Art Directors Guild has added a third category of competition for feature films in its annual Excellence in Production Design Awards by separating Period and Fantasy films that were previously linked together. The third feature category continues to be Contemporary. The addition, effective with this year's contest, was jointly announced today by ADG President Thomas A. Walsh and Awards Producers Tom Wilkins and Scott Meehan.

The other five categories of competition continue to be Single and Multiple Camera Television series; Television Movie or Mini-Series; Awards Show, Variety or Music Special or Documentary; and Commercials. In addition, the guild annually presents honorary awards for Lifetime Achievement and Cinematic Imagery. The 11th Annual Excellence in Production Design Awards will be presented Saturday, February 17, from the International Ballroom of the Beverly Hilton Hotel. Entry forms for television and commercials and overall rules and general awards information may be accessed on the ADG website: www.artdirectors.org.