A fellow bowler asked me about rules of pre-bowling.  They bowl in a 4 man team.  Two bowlers from their team were not going to be there on Friday.  They wanted to pre-bowl.  The other two bowlers on the team were wondering if they can just bowl on Friday.
I guess the question here is, do ALL team members need to pre-bowl together? Or can two of them pre-bowl and the other two bowl regular?