It is the marker's responsibility to announce if play was affected for the purpose of the Continuation Rule (17.C). Generally speaking, due to 17.L, calls made by another player cannot be said to affect play. However, in limited situations for contested marking violation calls, when the marker diverts their attention away from marking while reasonably and quickly assessing the conditions to the thrower's marking violation call, the marker could determine that play was affected. For example, the thrower calls straddle, and while the marker is looking at their feet to assess their marking position, the thrower completes a throw around the marker. If the marker subsequently contests the straddle because they assessed that they weren't committing a marking violation, they could claim that play was affected and the disc should be returned to the thrower. It is the thrower's responsibility to stop play as soon as possible after the marker makes their call contesting the marking violation (20.F).