Can a pitcher balk when no one is on base?

When the pitcher: 1.switches his pitching stance from the windup position to the set position (or vice versa) without properly disengaging the rubber; 2. when going from the stretch to the set position, fails to make a complete stop with his hands together before beginning to pitch; 3. throws from the rubber to a base without stepping toward (gaining distance in the direction of) that base; 4. throws from the rubber to a base where there is no runner and no possibility of a play; 5. steps or feints from the rubber to first base without completing the throw; 6. pitches a quick return pitch, that is, pitches with the intent to catch the batter off-guard; 7. pitches or mimics a part of his pitching motion while not in contact with the rubber; 8. drops the ball while on the rubber; 9. after a feint or throw to a base from the rubber, fails to disengage the rubber before reengaging and pitching; 10. after beginning to pitch, interrupts his pitching motion; 11. begins to pitch while the catcher is out of the catcher's box when giving an intentional walk; 12. while pitching, removes his pivot foot from the pitching rubber, except to pivot or as a natural consequence of stepping forward to release the pitch inordinately delays the game; 13. pitches while facing away from the batter; 14. after bringing his hands together on the rubber, separates them except in making a pitch or a throw; or stands on or astride the rubber without the ball, or mimics a pitch without the ball In addition, if a pitcher commits any of the following illegal actions, it may result in a balk under certain circumstances: expectorates on the ball, either hand or his glove; rubs the ball on his glove, person or clothing; applies a foreign substance of any kind to the ball; deface the ball in any manner; or delivers a ball altered in a manner described above or what is called the “shine” ball, “spit” ball, “mud” ball or “emery” ball.