No, it proves that since the law was written, and referees and players knew what it meant (release the ball when over the head), it's begun to be
interpreted differently. (Put it this way - you'd struggle to find any old LOAF with illustrations showing a throw-in with the ball released after it's been "over the head".) Apart from changing "deliver" to "throw", the method of throwing has not changed from "over the head". I can think of at least one other instance where how things were always understood has changed without the wording of the law changing (and the law left open to interpretation).
interpreted differently. (Put it this way - you'd struggle to find any old LOAF with illustrations showing a throw-in with the ball released after it's been "over the head".) Apart from changing "deliver" to "throw", the method of throwing has not changed from "over the head". I can think of at least one other instance where how things were always understood has changed without the wording of the law changing (and the law left open to interpretation).