How XFL rules will differ from NFL

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The rules for startup league, which will kick off next month, will include several departures from how the game is played in the NFL. Among the most significant changes is a shootout-style overtime procedure, with teams getting up to five one-play possessions from the 5-yard line worth two points each. The teams will alternate plays until one team is mathematically eliminated.

Here are some of the other notable rules the XFL is revealing Tuesday, many of which had previously been floated by Luck or otherwise rumored.

A 9-point touchdown?
Yes, this will officially be a thing in the XFL. The league is eliminating the traditional extra point and replacing it with a three-tiered PAT system:

A successful offensive play from the 2-yard line, worth 1 point
A play from the 5-yard line, worth 2 points
A play from the 10-yard line, worth 3 points

Other notable changes

A 25-second play clock, as opposed to the 40-second clock in the NFL
A designated ball-spotter, in an effort to speed up the pace of play
Requiring just one foot in bounds to complete a catch, as opposed to two in the NFL
A running clock, except in the final two minutes of each half

https://www.usatoday.com/story/sports/2020/01/07/xfl-how-rules-differ-nfl-including-shootout-style-ot-format/2830825001/