bob jenkins wroteNot only is it "o.k.", it's expected for C to call this.
This has a 100% high certainty 😀 of being correct. This has been discussed in other threads and as stated before, the Officials Manual gives provisions for transition. 3.3.5 C(2) states that the C is responsible for fouls and violations between top of the circle in the backcourt to top of the circle in front court. And I take this to mean sideline to sideline.
Once the transition is over (ball in the frontcourt) cover your PCA.