Gov. J.B. Pritzker will sign into law a statewide initiative that raises from 18 to 21 the minimum age to purchase tobacco products.

The signing ceremony Sunday in Chicago marks the end of a four-year effort by lawmakers and advocates to change the age to buy products containing nicotine — including cigarettes, e-cigarettes, vapes and chewing tobacco, to name a few.

Pritzker will be joined by the bill’s sponsors, Democrats Camille Lilly, a representative from Chicago, and Julie Morrison, a senator from Deerfield.

“When things get out of hand or are no longer tolerable, the people speak, and we as legislators come to bring that message and advocate,” Lilly said when the legislation passed the Senate in mid-March. “I get to have this be part of my history. I believe this is one of those bills that saves lives.”

Also joining the governor will be Senate President John Cullerton, a Democrat from Chicago and longtime supporter of “Tobacco 21;” House Republican Leader Jim Durkin, from Western Springs; Chicago Mayor Rahm Emmanuel; and U.S. Sen. Dick Durbin.

The measure’s passage comes as a victory for lawmakers and advocates, who have seen it succeed in the Senate in past years only to fail in the House.

Supporters say those who do not begin smoking before the age of 21 are less likely to start later.

But opponents historically made the same major argument against changing the law — that if 18 is old enough to vote in a political election, get married, open a bank account and join the armed forces, it also should be old enough to purchase and smoke a cigarette.

Detractors also were unhappy this session with the removal of language from current statute penalizing minors caught with tobacco products. They presently risk the possibility of taking a “smoker’s education or youth diversion program” with their parents, as well as the possibility of fines or community service.

The signing ceremony for House Bill 345 is scheduled for 1:30 p.m. at the Mile Square Health Center on South Wood Street in Chicago.

Contact Rebecca Anzel: ranzel@capitolnewsillinois.com.