Here is the WBSA rules on misses, chapter and verse given.
14. Foul and a Miss
(a) The striker shall, to the best of his ability, endeavour to hit the ball on or a
ball that could be on after a Red has been potted. If the referee considers
the Rule infringed, he shall call FOUL AND A MISS unless:
(i) any player needed penalty points before, or as a result of, the stroke
being played;
(ii) before or after the stroke, the points available on the table are equal
to the points difference excluding the value of the re-spotted black;
and the referee is satisfied that the miss was not intentional.
(iii) a situation exists where it is impossible to hit the ball on.
In the latter case it must be assumed the striker is attempting to hit the
ball on provided that he plays, directly or indirectly, at the ball on with
sufficient strength, in the referee‟s opinion, to have reached the ball on
but for the obstructing ball or balls.
(b) After a FOUL AND A MISS has been called, the next player may request
the offender to play again from the position left, or at his discretion, from
the original position, with all balls being replaced, in which latter case the
ball on shall be the same as it was prior to the last stroke made, namely:
(i) Any Red, where Red was the ball on;
(ii) the colour on, where all Reds were off the table; or
(iii) a colour of the striker’s choice, where the ball on was a colour after a
Red had been potted.
(c) If the striker, in making a stroke, fails to first hit a ball on when there is a
clear path in a straight line from the cue-ball to any part of any ball that is
or could be on, the referee shall always call FOUL AND A MISS unless as
described under paragraph (a)(i) and (a)(ii).
(d) After a miss has been called under paragraph (c) above when there was
a clear path in a straight line from the cue-ball to a ball that was on or
could have been on, such that central, full ball, contact was available (in
the case of Reds, this to be taken as a full diameter of any Red that is not
obstructed by a colour), then:
(i) a further failure to first hit a ball on in making a stroke from the
original position shall be called as a FOUL AND A MISS regardless
of the difference in scores;
(ii) if asked to play again from the original position, the offender shall be
warned by the referee that a third failure will result in the frame being
awarded to his opponent; and
Section 3 - Snooker
(iii) if asked to play from the position left, the FOUL AND A MISS
situation starts again.
(e) After the cue-ball has been replaced under this Rule, and the striker fouls
any ball, including the cue-ball while preparing to play a stroke, a miss will
not be called if a stroke has not been played. In this case the appropriate
penalty will be imposed. The next player may then elect to play himself or
ask the offender to play again from the position left or the original
position. If being asked to play again, the ball on shall be the same as
prior to the last stroke made, namely:
(i) any Red, where Red was the ball on;
(ii) the colour on, where all Reds were off the table; or
(iii) a colour of the striker’s choice, where the ball on was a colour after a
Red had been potted;
If the above situation arises during a sequence of miss calls as described
under paragraph (d), any warning concerning the possible awarding of
the frame to his opponent shall remain in effect.
(f) When any ball is being replaced after a miss, both the offender and the
next player will be consulted as to its position, after which the referee‟s
decision shall be final.
(g) During such consultation, if either player should touch any ball in play, he
shall be penalised as if he were the striker, without affecting the order of
play. The ball touched shall be replaced by the referee, to his satisfaction,
even if it was picked up, Section 3. 10 (d) (iii).