House Television, Associated Press
This video image provided by House Television shows Rep. Gabrielle Giffords, D-Ariz. and House Speaker John Boehner of Ohio, on the floor of the House on Capitol Hill in Washington, Wednesday, Jan. 25, 2012. Giffords resigned from the House on Wednesday amid tears, tributes and standing ovations, more than a year after she was gravely wounded by a would-be assassin.

WASHINGTON — The Senate has passed an anti-smuggling bill that was the final legislative act of Rep. Gabrielle Giffords.

The Senate vote came a day after the bill passed the House and Giffords formally resigned from her Arizona seat.

The legislation would increase penalties against smugglers who use ultralight, low-flying planes to transport drugs across the Mexican border.

It now goes to the president for his signature. The House voted 408-0 for the measure on Wednesday, minutes after Giffords submitted her resignation and was surrounded by hundreds of her colleagues gathered to pay her tribute.

Giffords was severely wounded by a would-be assassin a year ago at a Tucson shopping center. Giffords said she was resigning to focus on her recovery. Six people were killed in the attack and 12 others wounded.