The City Council approved a labor agreement reached between the Wu administration and the city’s firefighters union, Local 718. The sign-off, which came at Wednesday’s Council meeting and sent the agreement to Mayor Wu’s desk, was unanimous.

The agreement, which Wu announced at the Greater Boston Labor Council’s Labor Day breakfast earlier this month, runs from July 2021 through June 2024, and costs $27.3 million. “The major provisions of the contract include base wage increases of 3%, 3%, and 2.5%, to be given in July of each fiscal year of the contract term,” Wu said in a Sept. 18 filing with the Council. “The agreement also includes increases to hazardous duty pay and the detail rate.”

A total of 48 city contracts had expired by the time Wu took office in November 2021. Nearly two years later, the remaining city contracts left on the table involve the police unions, and the largest union, the Boston Police Patrolmen’s Association (BPPA), has sought arbitration.

The 1,600-member firefighters union, which is based out of Dorchester’s Florian Hall, ratified their contract earlier this month.

The City Council is legally prohibited from inserting itself into labor negotiations between the mayor’s office and a union, but the 13-member body gets an up or down vote on contracts once they’re filed by the mayor’s office, since the matter deals with appropriations within the Council’s purview.

The Council’s Committee on City Services, chaired by District 4 Councillor Brian Worrell (Dorchester and Mattapan), held a hearing on the agreement on Sept. 26, and Lou Mandarini III, Wu’s senior labor policy adviser, testified on behalf of the administration. Sam Dillon, the head of Local 718, also appeared to voice support for the agreement.

At the hearing, City Councillor At-Large Michael Flaherty noted the contract ends next June. “You’re going to have to be right back at the table,” he said.

“This was a catch-up contract,” Mandarini acknowledged.

He said the mayor is set on never allowing a labor contract to expire without having another contract already in place. Mandarini called it an “operational imperative,” and quipped, “We don’t ever actually leave the table.”