With President-elect Joe Biden still picking staff for his upcoming administration, according to NBC Boston, he has selected Boston Mayor Marty Walsh as his nominee for labor secretary, setting up a historic feat for the city.

According to the Boston city charter, the city council president will step in to become the acting mayor if the role becomes vacant. That would lead to Boston City Council President Kim Janey to step in that role, setting her up to become the city’s first Black mayor as well as its first female mayor.

Janey would take the position as acting mayor until the next scheduled election, but that depends on when Walsh officially vacates the role. If he leaves his position after March 5, Janey would stay in the role until the November general election. If he leaves before that date, the city council could call a special election before November.