Developer Larry Silverstein has formal proposals from two potential tenants for 3 World Trade Center, which if accepted would allow the developer to build the skyscraper to its full 80 stories, sources said.

Group M, a division of UK ad giant WPP, and law firm White & Case have sent statements saying they are interested in taking as much as 1.1 million square feet at the tower, said the sources, adding no terms have been agreed upon. A Silverstein spokesman,declined to comment.