Almost a month after the San Francisco Board of Supervisors declared the National Rifle Association a “domestic terrorist organization,” leading the gun rights group to file a lawsuit, Mayor London Breed reminded city staff in a memo that the nonbinding resolution does not limit contracts with groups doing business with the pro-Second Amendment organization.

While the resolution drew national attention, it has no legal teeth. Resolutions are merely a statement of values from the Board of Supervisors that cannot change city law. The memo, sent from Breed and the city attorney’s office, reminded city officials that the resolution does not impose any new rules.

“Because the resolution did not change City law, the City’s contracting processes and policies have not changed and will not change as a result of the Resolution,” the memo says.

The memo comes in the wake of the Board of Supervisors unanimously approving a resolution on Sept. 3 that called for the city to investigate ties between its contractors and vendors and the NRA. The gun rights group responded with a lawsuit less than a week later, saying the decision limited the NRA’s First Amendment rights.

The resolution’s sponsor, Supervisor Catherine Stefani, said Tuesday that she “knew all along that this was a nonbinding resolution. We made our point: The NRA is a terrorist organization. I will keep fighting them using every tool at my disposal.”

Stefani told The Chronicle a few weeks ago that she sponsored the resolution “after the Gilroy Garlic Festival shooting, and I was just completely destroyed yet again. I couldn’t get the image of that 6-year-old boy, Stephen Romero, out of my mind.”

She added, “The resolution practically wrote itself.”

Stefani blamed the NRA for the proliferation of guns in the United States and the mass shootings that have become a near daily occurrence. The nonbinding resolution also urged other cities, states and the federal government to ascribe the same label to the gun lobbyist group.

Breed weighed in on the matter Tuesday, saying that an “epidemic of gun violence is plaguing our country, and we need to hold organizations like the NRA accountable for their obstruction to real reforms to make our communities safer. While this nonbinding resolution has no force of law behind it, this doesn’t take away from the fact that the NRA continues to stand in the way of every single piece of gun control legislation put forward that can and will save lives.”

The NRA said Tuesday that, despite the memo, it will not drop the lawsuit.

“Mayor Breed’s apparent memo is, of course, a positive development,” William A. Brewer III, counsel to the NRA, said in a statement. “But San Francisco publicly, officially maligned law-abiding NRA members as terrorists and publicly, officially vowed to blacklist them from government work. When the City publicly, officially withdraws its unconstitutional threat, the NRA will withdraw its lawsuit.”

John Coté, a spokesman for City Attorney Dennis Herrera, disputed the NRA’s interpretation of the memo.

“The memo is not a concession,” Coté said in a statement. “It just explains what has always been true — the resolution does not change the law. If the NRA thinks this is a win, it’s only because their lawsuit completely distorts what the resolution actually does.”

San Francisco Chronicle staff writer Trisha Thadani contributed to this story.

Josh Koehn is a San Francisco Chronicle staff writer. Email: josh.koehn@sfchronicle.com Twitter: @Josh_koehn