John, Yes it is anywhere within the 45 deg arc, but the height is fixed, ( copied fron the CPSA rules)
At a distance of 9.14m (10yd) from the trap, a regular target shall attain a height of 2.44m (2.66yd) to 3.05m (3.33yd). To ensure the correct elevation, a 2.44m (2.66yd) pole with a hoop 61cm...