The play clock will be set to 40 seconds between a touchdown and the PAT or two-point conversion and after a kickoff.Offensive players cannot block below the waist more than five yards past the line of scrimmage and, with the exception of interior linemen, all blocks below the waist must be from the front.Allow players to fair catch the ball inside the 25 yard line on a kickoff and be awarded a touchback, placing the ball at the 25 yard line.The following rule changes were approved by the NCAA Playing Rules Oversight Panel for the 2018 season: The Clemson Tigers won the title game over the Alabama Crimson Tide, the school's third national title and second in three years, and also becoming the first team since the 1897 Penn Quakers to have a perfect 15-0 season. The postseason concluded on January 7, 2019, with the 2019 College Football Playoff National Championship at Levi's Stadium in Santa Clara, California. The regular season began on August 25, 2018, and ended on December 8, 2018. The 2018 NCAA Division I FBS football season was the highest level college football competition in the United States organized by the National Collegiate Athletic Association (NCAA) in 2018.