What makes a pitch illegal, and what's the penalty in 14U?

Q: What makes a pitch illegal, and what's the penalty in 14U?

Key Rule 6A requirements for girls fastpitch: Start: both feet on the ground within the 24-inch length of the pitcher's plate, pivot foot touching it, shoulders in line with first and third. Take (or appear to take) the signal with hands apart. Pause: bring the hands together for at least 1 and no more than 10 seconds. Delivery: underhand, hand below the hip, no more than one revolution of the arm, no stop or reversal after the hands separate, and release on the throwing-arm side. Step: one step with the non-pivot foot, forward toward the batter and within the 24-inch width of the plate. A leap or drag is legal for girls. Lifting the pivot foot and putting it back down (rocking) is illegal. Pace: release the pitch within 20 seconds of getting the ball (otherwise a ball is called). Warm-ups: up to 5 pitches in one minute at the start of each half-inning or for a new pitcher. Don't throw to a base with a foot on the pitcher's plate. Step back off it first. Junior Olympic illegal pitch penalty: If the batter reaches first safely and every runner advances at least one base, the play stands. Otherwise the offensive coach chooses between the result of the play and a ball on the batter. Runners are not awarded bases, unlike in adult fastpitch. A batter hit by an illegal pitch she didn't swing at gets first base.

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Accepted Answer

Key Rule 6A requirements for girls fastpitch:

Start: both feet on the ground within the 24-inch length of the pitcher's plate, pivot foot touching it, shoulders in line with first and third. Take (or appear to take) the signal with hands apart.
Pause: bring the hands together for at least 1 and no more than 10 seconds.
Delivery: underhand, hand below the hip, no more than one revolution of the arm, no stop or reversal after the hands separate, and release on the throwing-arm side.
Step: one step with the non-pivot foot, forward toward the batter and within the 24-inch width of the plate. A leap or drag is legal for girls. Lifting the pivot foot and putting it back down (rocking) is illegal.
Pace: release the pitch within 20 seconds of getting the ball (otherwise a ball is called).
Warm-ups: up to 5 pitches in one minute at the start of each half-inning or for a new pitcher.
Don't throw to a base with a foot on the pitcher's plate. Step back off it first.

Junior Olympic illegal pitch penalty:

If the batter reaches first safely and every runner advances at least one base, the play stands.
Otherwise the offensive coach chooses between the result of the play and a ball on the batter. Runners are not awarded bases, unlike in adult fastpitch.
A batter hit by an illegal pitch she didn't swing at gets first base.