The rules are extreme — if not excessive.

Handshakes and high-fives are prohibited. The same goes for fist bumps. During games, you can’t re-use towels. After games, you can’t use the spa, sauna or steam room to soak those sore muscles. Want to take the elevator to your hotel room? Make sure to use your knuckle or elbow — not your finger — to push the buttons. And remember that talking is strictly off limits once the doors close.

This is what life inside the “bubble” could look like when the NHL moves towards Phase 4 of its plan to conclude the season.

The 47-page return-to-play document, which covers everything from daily tests and disinfecting dressing rooms to preparing team meals and the proper way of behaving in the hotel, still has to be agreed upon by the NHLPA and the Board of Governors. And with a failure-to-comply penalty of a lost draft choice, it might sound a tad draconian.

But according to an infectious disease physician, the strict guidelines is what separates the NHL from the NBA and MLB in being able to safely crown a champion sometime this year.