Variety, which first reported the show's nudity clauses, said the envelope-pushing scenes may not appear on NBC but instead be used in R-rated versions of the show overseas or on cable.
During NBC's annual upfront presentation to prospective advertisers in May, Heard downplayed the controversy, saying the show is driven less by sex than it is character.
"It's a group of friends who become family within this interesting, rich setting," she said. "I think the plot and stars can't help but take center stage. The racy material, you'll find, is not all that racy.
"I think it's a story about the time, the setting, the movement, the people behind it," she added. "It's a story about a group of girls taking over Chicago, and I think that's what will come through."
Though only a few clips from the pilot have surfaced on the Internet, several people are already up in arms.
Trueman, the former chief of the Justice Department's child exploitation and obscenity section, said depictions of sex could violate federal indecency laws.
"I can't say definitively say what the content will be," he said. "Let's say it's not a violation. Millions of people are still opposed to it because of the of Playboy brand."
Trueman is encouraging citizens to sign a pledge at CloseTheClubOnNBC.com. The website also encourages people to complain to their local affiliates.
KSL, a Salt Lake City affiliate owned by the Church of Latter Day Saints, has already refused to air the show. It was eventually picked up by a MyNetworkTV affiliate in the city.
Shelly Lubben, a former adult star who now is an anti-porn crusader, is also leading a fight against the show through her Pink Cross Foundation.
"NBC is appearing to defy FCC laws, while contributing to sexualization/victimization of women, which results in trafficking, rape and prostitution," Lubben wrote on her blog, encouraging people to sign a petition to halt the show.
The show also stars Jenna Dewan, wife of Channing Tatum, Naturi Naughton and David Krumholtz.