1. Telecow, Jetcow, Landcow are allowed;
2. Telecide, Jetcide, Landcide and any other kind of suicide (not killing) are allowed,
    but player who committed suicide with his worm is disallowed to use neither teleport nor jepack during next turn.

In case of breaking 2nd rule (player did use teleport or jetpack after committing suicide on his next turn) - cow:

• The player must to skip his next turn;
• If breaker did not skip his next turn - automatic lose for a breaker;
• More than 2 cows - automatic lose for a breaker

1. Telecide, Jetcide, Landcide and any other kind of suicide with your active worm are allowed, but only if: 

• That suicide deals some grave damage to the opponent's worm (even indirectly, for example, you use your grave explosion to push mines, or to blow up barrels);
• To kill opponent's worm with any weapon and you may suicide your active worm (simultaneously or by order)

In case of fail to do options 1 or 2 - you are disallowed to use neither teleport nor jepack next turn. But, see the list below for some exceptions:

      Other allowed methods to suicide/kill your worms without taking any penalty:

   
• killing your non-active worm
• using pre-generated objects (mines, barrels) and flames on the map + previously dropped mines by player