Democratic Assemblyman Rob Bonta introduced the bill in January. He was also part of the group that pushed for approval of Proposition 64.

"This directs us to forget any prior behavior that was illegal. They should not be given a pass," Republican state Sen. Nielsen, who opposed the measure, told colleagues, according to The Los Angeles Times.

NPR reported in December that more than 4,000 people had already petitioned the courts regarding their marijuana-related crimes. However, there are still many people who are unaware that they are eligible to petition for a review of their conviction. NPR's Ari Shapiro spoke with San Francisco District Attorney George Gascon in February on the subject.

San Francisco took measures to expunge and reduce the convictions for possession and recreational use going back to 1975 because only 23 people in the city started the process themselves.

"The problem is that if you go through that process, you have to hire an attorney. You have to petition the court. You have to come for a hearing. It's a very expensive and very cumbersome process," Gascon said in the interview.

"[The] reality is that the majority of the people that were punished and were the ones that suffered in this war on marijuana, war on drugs nationally were people that can ill afford to pay an attorney," he said.

The new bill would alleviate that stress, according to Bonta, who was quoted in the LA Times.

"[The] role of government should be to ease burdens and expedite the operation of law — not create unneeded obstacles, barriers and delay," he said, according to the newspaper.

In December 2017, Brown pardoned nearly 150 people including about 60 who were convicted on charges concerning controlled substances and drugs. At least 10 of those pardons and sentence reductions were for individuals convicted on marijuana charges.

State law gives Brown 12 days from Wednesday to sign or veto the legislation or it becomes law without his signature.