1940 Britain: Richmond Golf Club Temporary Rules
1. Players are asked to collect Bomb and Shrapnel splinters to prevent these causing damage to Mowing Machines.
2. In Competitions, during gunfire or while bombs are falling players may take cover without penalty for ceasing play.
3. The positions of known delayed action bombs are marked by red flags at a reasonably, but not guaranteed, safe distance therefrom.
4. Shrapnel and or bmb splinters on the Fairways, or in Bunkers within a club's length of a ball, maybe moved without penalty, and no penalty shall be incurred if a ball is thereby caused to move accidentally.
5. A ball moved by enemy action maybe replaced, or if lost or destroyed, a ball maybe dropped not nearer the hole without penalty.
6. A ball lying in a crater maybe lifted and dropped not nearer the hole, preserving the line yo the hole, without penalty.
7. A player whose stroke is affected by the simultaneous of a bomb may play another ball from the same place. Penalty one stroke.

I edited this list because when I transcribed it from the written document (a real estate sales brochure from England) I fupped-duck.