LOS ANGELES (CNS) – Bills to return a ban on assault weapons in the United States will be introduced in both the Senate and House of Representatives on the first day they are in session next month, California Sen. Dianne Feinstein vowed on national television.

"We've tried to take my bill from '94 to 2004 and perfect it," the California Democrat said on the NBC "Meet The Press" on program Sunday, Dec. 16. Feinstein authored a federal ban on assault weapons in 1994, a ban that was allowed to expire by Congress in 2004.

On NBC, California's senior senator said her staff has crafted a bill that would "exempt over 900 specific weapons that will not ... fall under the bill." She said the 1994 assault rifle bill that she wrote was never challenged in court by the National Rifle Association. "Back in '93, when I told Joe Biden, who was chairman of the Judiciary Committee, that I was going to move this as an amendment on the Crime Bill he laughed at me," Feinstein said. "He said, 'you're new here. Wait till you learn,'" Feinstein related. "And we got it through the Senate, we got it through the House, the White House came alive and ... the bill was passed."

The NRA has declined to comment on gun issues since Friday's slaying of 20 grade school children and seven adults in Connecticut.

In 2002, the proposed extension of the assault weapons ban was opposed by the Coalition Against the Semi-Auto Ban, a project of the National Association for Gun Rights.

The group said the original legislation violated the right to keep and bear arms guaranteed by the Second Amendment; claiming that what the law called assault weapons was rarely used in crimes and that specifying a type of weapon for a ban was a tactic that would lead to banning all weapons.

Feinstein, who just won her fifth Senate election, was propelled to the forefront of California politics when she suddenly became mayor of San Francisco when Mayor George Moscone and Supervisor Harvey Milk were assassinated there in 1978. She has been a leading voice for gun control since then.