If during a rally interference between players
occurs, then the offended player should ask for a Let or a Stroke as they
see fit. The offending player can either agree or give their own
interpretation of the incident. A negotiation then occurs, and a decision is
agreed by the players before that game continues.
Marker is present, the players still make the decision and inform the Marker
who records it before announcing the score. In the event that the players
cannot agree a decision, then the maker has the casting vote and supports
one of the players.