The president signed the bill at the Presidential Villa after months of advocacy for its passage into law.
The president had earlier disclosed during his Democracy Day address on Tuesday, May 29, that he would sign the bill soon and delivered on that promise in the signing that took place inside the Council Chambers at the Presidential Villa on Thursday, May 31, 2018.
With the signing of the bill, Sections 65, 106, 131, and 177 of the 1999 Constitution (as amended) have been altered to reduce the age of qualification for the office of the President from 40 to 35 years; House of Reps from 30 to 25 years; and the House of Assembly from 30 to 25 years.
After signing the bill on Thursday, President Buhari took to his official Twitter account (@MBuhari) to refer to it as a historic day for the country.
He tweeted, "At 2.30pm today May 31, 2018, I signed into law the #NotTooYoungToRun Bill, a landmark piece of legislation that was conceived, championed and accomplished by young Nigerians. The Bill has now become an Act of Parliament. It is a historic day for Nigeria."
The bill was initially passed by the Senate in July 2017 while a large majority of members in the House of Representatives also signed off on it before it moved to Houses of Assembly where it was passed by 33 out of 36 states.