Putin will be 83 in 2036. He has already served two consecutive terms as president from 2000 till 2008. Now passing this law makes Putin’s position even stronger.
He then served two terms as prime minister. These amendments manifest a major overhaul of the constitution. Earlier also opposition has accused Putin of abuse of power.
If Putin gets reelected twice, he will get to serve to the end of the second term. This will made him beat Josef Stalin to become the longest-serving leader of Russia since Peter the Great, who was in power for 42 years.