Jeff Passan gives the logistics for MLB's deal with the players' association to grant a full season of service, regardless of the number of games played. (1:40)

Major League Baseball owners have approved a plan to address salary and service-time issues amid the indefinite delay to the start of the regular season, according to ESPN and multiple reports.

The owners completed an agreement reached between MLB and the players' union Thursday night, which came after nearly two weeks of morning-to-night negotiations that involved players, owners, agents, executives, union officials and commissioner's office staff.

As part of the agreement, obtained by ESPN's Jeff Passan, the players and MLB primarily agreed that the 2020 season will not start until each of the following conditions are met:

There are no bans on mass gatherings that would limit the ability to play in front of fans. However, the commissioner could still consider the "use of appropriate substitute neutral sites where economically feasible";

There are no travel restrictions throughout the United States and Canada;

Medical experts determine that there would be no health risks for players, staff or fans, with the commissioners and union still able to revisit the idea of playing in empty stadiums.

While there was no formal framework in the agreement, owners and players both want to play as many games as possible. The flexibility of both sides was seen in the willingness to extend the regular season into October, play neutral-site playoff games in November and add doubleheaders to the schedule.

"Players want to play,'' MLBPA executive director Tony Clark told USA TODAY Sports on Friday. "That's what we do. Being able to get back on the field and being able to play, even if that means their fans are watching at home. Being able to play for their fans is something they've all expressed a desire and an interest to do, and to do so as soon as possible."

Clark told USA Today Sports that the players are "very open" to games being held in empty stadiums and at neutral sites.

"That possibility exists," Clark said. "... The opportunity to play in neutral sites is something both sides are willing to discuss.''

Players pushed to receive a full year of service time, which counts days toward free agency, arbitration and pension, even in the event of a canceled season. When MLB agreed to grant that, the path to a deal coming together was forged, sources said.

The union agreed not to sue the league for full salaries in the event that the 2020 season never takes place, and MLB will advance players $170 million over the next two months, sources said. The MLBPA will divvy up the lump sum among four classes of players, with the majority of it going to those with guaranteed major league contracts. If games are played, the advance will count against final salaries, which will be prorated.

Commissioner Rob Manfred has the discretion to shorten the 2020 draft to as few as five rounds, and it will be moved from June to sometime in July, sources said.

Manfred also can delay the 2020 international signing period, which was supposed to run from July 2, 2020, through June 15, 2021, to at the latest Jan. 1, 2021, through Dec. 15, 2021. MLB also has the right to shorten the 2021 draft to as few as 20 rounds and push back the next international signing period as well -- though international free agency might well be gone by then, as the league plans to pursue an international draft at the conclusion of the current collective bargaining agreement, which runs out in December 2021.

Sources said players drafted in 2020 will get only $100,000 of their bonus this year. The remaining amount will be split into payments made in July 2021 and July 2022.

Also, teams will be unable to trade draft picks or international slot money, sources said.

Mookie Betts, J.T. Realmuto, Trevor Bauer and Marcus Stroman, among others, are guaranteed to be free agents come November regardless of the season's status. If the year is canceled, Betts might never play for the Los Angeles Dodgers, who traded for him this offseason.

The agreement also calls for a transaction freeze, which bars teams from signing free agents, trading players and making roster moves.

And there will be a rejiggered setting for arbitration, the system that awards players with three, four and five years of service time with higher salaries. While arbitration is a numbers- and precedent-based system typically, the sides will change that to acknowledge the shorter schedule.

Any players punished with a drug suspension will serve the penalty in 2020, even if there is no season, sources said.

While both sides believed they made concessions, they settled around an obvious point: No sports league wants to be seen as bickering about billions of dollars amid an international health and financial crisis. In addition to the agreed-upon financial particulars, the parties engaged in significant discussions about the most vital issue now and in the future: how to proceed amid the outbreak of COVID-19 cases.

"Right now, no door is closed," Clark told USA TODAY Sports. "... We resolved a number of issues that were a direct cause of the pandemic. We remain as optimistic as we can be that we'll be able to play as many games as possible."