Tim Bradbury/Getty Images

NFL owners will vote on 15 possible rule changes during the NFL spring league meeting in Phoenix.

On Thursday, Ricky Henne of the Los Angeles Chargers' official website shared all 15 proposals.

Among the highlights was a proposal by the NFL Competition Committee that would make overtimes during the regular season and preseason just 10 minutes instead of 15.

Another proposal would change the challenge system, giving a team a third one if successful on either of the first two. What's more, reviewable plays would extend beyond just the final two minutes of the second and fourth quarters.

Here is a look at all 15 potential rule changes, per Henne:

Proposed By Proposal Philadelphia More protection for long snappers during kicking situations Philadelphia Cannot attempt to block a field goal or extra point using a "leaper" Philadelphia The "crown of the helmet" foul would also include the "hairline" part of the helmet Philadelphia Challenge changes explained above Washington No longer a limit of three challenges per team, and no longer a requirement that a team wins its first two to earn the third Washington Touchback is at the 20-yard line if the kick goes through the uprights Buffalo and Seattle Coaches can challenge any play but ones ending in points or turnovers Competition Committee Permanent rule ejecting a player with two specific types of unsportsmanlike fouls Competition Committee Touchback goes to the 25-yard line for one year only Competition Committee Overtime rules explained above Competition Committee Receivers running routes are protected as defenseless players Competition Committee Backfield players in motion cannot execute crackback blocks Competition Committee Sideline replay monitors to be replaced by hand-held devices; also designates officials to make final decisions on reviews Competition Committee Committing multiple fouls on one play to influence the clock is an unsportsmanlike conduct Competition Committee Actions to conserve time following the two-minute warning would be illegal Source: Chargers.com

The overtime rule stands out, and Mike Florio of Pro Football Talk suggested it would result in more ties with the format in place where the opposing team gets an opportunity to respond if the first possession results in a field goal. Florio imagined a scenario where each team kicks a field goal and uses all or the majority of the 10 minutes.

Competition Committee chairman Rich McKay responded to that notion during a conference call, per Florio. "We don't think it will lead to more ties," McKay said. "Could it? It could. We're more concerned about player safety."

Outside of the rule change proposals, Barry Wilner of the Associated Press (h/t ABC News) noted the potential relocation from Oakland for the Raiders will also be discussed in Phoenix.