Booklet 7 states......
hIGh hOUSE
5.12 At a point 91cm (35.82in) beyond the station marker 1 (measured along the base chord
extended), and 3.05m (3.33yd) above the level of station 1.
LOW hOUSE
5.13 At a point 91cm (35.82in) beyond station marker 7 (measured along the base chord extended),
and 76cm (29.92 in) from the base chord extended (measured on the side of the target crossing point),
and 1.07m (1.17yd) above the level of station 7.
5.14 The targets shall fly a distance of 50m (54.68yd) to 52m (56.86yd) and pass within 45cm
(17.71in) of a point 4.57m (4.99yd) above the ground known as the Target Crossing Point (see Layout).
5.15 Where the Referee is satisfied that a variation in target trajectory, due to wind or some other
unavoidable condition, is such that the equity of the competition cannot be maintained, a request may be
made by the Referee to the Jury to reset the targets.
Picture of the layout can be seen on page 29 of booklet 7.
https://www.cpsa.co.uk/userfiles/file/35901_CPSA_Booklet_7.pdf
Is this what you were looking for?
Cannot see anything about a point that it should be shot by...?