NFL players who contract the coronavirus through "high-risk" activity away from team facilities can face team discipline and might be at risk of not being paid, according to the league's new protocol.

A memo sent by the NFLPA to agents this weekend, a copy of which was obtained by ESPN, outlines several rules governing player contracts, opt-out provisions and the contractual consequences of a canceled season.

The memo says that the final language of Friday's agreement between the league and the players will appear in a side letter that is still being negotiated and that the information distributed this weekend represents "a summary of major aspects of the COVID amendments." The basics have been dealt with, and the final section of the memo is devoted to the fact that players will be held responsible for the way they circulate in public while the coronavirus remains present.

Players were told weeks ago on a conference call with NFLPA leadership that they could face discipline, including fines, for conduct detrimental to the team if they are found to have contracted COVID-19 through reckless activity away from the facility. This weekend's memo reinforces that and says that such activity could allow a team to challenge the status of a COVID-19 diagnosis as a football injury.

If such a challenge were to succeed, presumably the team could place the player on the non-football injury list, a move that would allow the team the option of not paying him.

To be clear on the procedure, players are required to test negative twice before they will be allowed entry to the team facility at the start of training camp. Any player who is diagnosed with COVID-19 after two negative entry tests will have his condition diagnosed as a football injury, per the NFL/NLFPA agreement, and the team will be able to place that player on a COVID-19-specific injured reserve list, from which he will be allowed to return after meeting certain criteria.

The memo also states: "Clubs/NFL can challenge designation as a football related injury if it can prove that the player contracted COVID-19 through engaging in high risk conduct below. (This issue remains open.)"

Per the memo, the NFL defines high-risk conduct as attending:

• an indoor nightclub with more than 15 people

• an indoor bar with more than 15 people, other than to pick up food

• an indoor house party with more than 15 people

• an indoor music concert/entertainment event with more than 15 people

• a professional sporting event, other than applicable NFL games or events, with more than 15 people

• an indoor religious service attended by more than 25% of a venue's capacity

"Players are going to have to be careful outside the building," Los Angeles Rams tackle Andrew Whitworth said last week on a conference call after disclosing that he and his entire family got the virus after one of them went to lunch with a friend. "All it takes is one exposure, and it can spread like wildfire."

Other items addressed in this weekend's NFLPA memo:

• There will be no reduction in 2020 players' salaries or bonuses if there is a complete NFL season.

• $17 million in 2020 player benefits have been canceled, including the second career savings plan, tuition assistance and playoff bye week pay. Those benefits will be repaid to players through a new benefit after 2023. Most of the canceled benefits would have been new this year under the CBA signed in March, and they will instead begin in 2021.

• If at least one week of NFL games is played, players who were on a team's Week 1 roster or practice squad will not have their contracts toll and will receive one full-credited season for the purpose of pension and benefits and an accrued season toward free agency.

• A player who chooses to opt out of the 2020 season must inform his team in writing within seven days of the finalizing of the side letter. His contract will toll, meaning it will pick up next year where it is now. As long as he earned a credited season in 2019 or was drafted in 2020, he will get a stipend of $150,000, which will be treated as a salary advance and come out of future years' pay.

• A player who chooses to opt out because he is in a higher-risk medical category will get a $350,000 stipend that is not an advance against future salary. He will receive an accrued season toward free agency and a credited season toward player benefits and minimum salary.

The memo lists 15 conditions that qualify as long as a player has a diagnosis of one of them on his medical records prior to the NFL/NFLPA agreement. The high-risk categories are cancer; chronic kidney disease; COPD; weakened immune system from solid organ transplant; serious heart condition such as heart failure, coronary artery disease or cardiomyopathies; sickle cell disease; type-2 diabetes; asthma; cerebrovascular disease; cystic fibrosis; hypertension or high blood pressure; weakened immune system from blood or bone marrow transplant, immune deficiencies, HIV, use of corticosteroids or use of other immune-weakening medicines; neurological conditions such as dementia; liver disease; and pulmonary fibrosis.

• A team must offer separate housing to a player who has a high-risk individual living with him, if the player requests it.

• If the season is canceled before final training camp roster cutdown, any player who is on a training camp roster and earned a 2019 credited season or was drafted in 2020 will get a $250,000 stipend and his NFL player health insurance. A player who did not earn a 2019 credited season or was undrafted in 2020 will get a $50,000 stipend. If the season is canceled before final roster cutdowns, all contracts toll.

• If the season is canceled after final cutdown, a player who is on the roster at the time of cancellation will get a stipend of $300,000 offset by any salary he earned during the season, plus health insurance. Practice squad players will get $100,000 stipends (offset by any salary already earned) and health insurance.