I really don't know about Vegas golf rules, and would not worry about them unless you made a bet in Vegas. Offshore books that take golf bets generally post rules to cover most circumstances, example from Pinnacle:
If the start of a round is delayed, or if play during a round is suspended, all pending wagers will remain valid for 48 hours. If the postponement lasts more than 48 hours, all wagers will be canceled and the monies refunded.
In the event a tournament does not go the specified number of completed holes (usually 72), and the tournament is shortened by tournament officials, the leader at the end of the number of holes determined to be official by tournament officials shall be the winner.
Example: A tournament is scheduled for 72 holes, but only 54 holes can be played because of weather. The leader at the end of 54 holes would be declared the winner of the tournament.
In the event that two (or more) golfers are tied for the lead at the end of regulation play, a sudden death playoff is normally used to determine the winner of the tournament. In this case, the winner of the playoff is the winner for betting purposes. All other golfers in the playoff will be graded as 2nd place finishers.
Example: Smith and Lee are tied at the end of regulation play, and a sudden death playoff is declared. Smith scores a 4 on the first playoff hole, and Lee scores a 5. Smith is the winner of the tournament, and Lee is awarded a 2nd place finish.
In some tournaments, tournament officials may have the individuals play a specified number of holes to determine the tournament winner. In this case, the golfer with the lowest score after the specified number of holes have been completed shall be declared the winner, and all other golfers in the playoff will be graded as 2nd place finishers.
Golf Match-ups:
In head to head match-ups, both golfers must tee off in order to have action. If both players tee off, the golfer with the most completed holes is the winner of the match-up; if both players complete the same number of holes, the one with the lower score is the winner.
Example: Match-up money-line:
Lee -120
Smith +100
If Lee and Smith both tee off for the tournament in question, the above match-up is "in action". If both golfers fail to make the cut to advance to the final rounds of play, the golfer with the lower score wins.
Suppose Lee completes 36 holes with a score of +8; Smith completes 36 holes with a score of +9. In this case, Lee wins the match-up since he has a lower score than Smith does.
If Lee and Smith complete regulation play, and each has a score of -3, the match-up would be a tie, and monies refunded, except in the case where Lee and Smith were tied for 1st place at the end of regulation play (in which case a sudden death playoff would be used to determine the winner).
Golf Three-Way Matchups (Three-Balls):
Wagers on three-way golf matchups, known as "three-balls", will be decided by the lowest score after one full round of play. A full round is complete when 18 holes have been completed.
If a player who has started withdraws before completing 18 holes, he is deemed a loser regardless of the score. A player has started once he tees off on the first hole. If any player withdraws before starting, all bets on all players in his group are cancelled.
In the event of starting groups being rearranged, bets will be settled on the original groups.
Breaking Ties:
In case of a tie for the low score in three-ball matches, we use the European dead heat rule:
If two golfers tie for the best score, a bet on either of these golfers will be settled and paid as follows: Half the bet (lay amount) is paid off at the quoted price, and half the bet loses. A bet on the golfer who finishes last is a losing bet.
If all three golfers tie for the best score, a bet on any of these golfers will be settled and paid as follows: One-third of the bet (lay amount) is paid off at the quoted price, and two-thirds of the bet loses.
wil.
If the start of a round is delayed, or if play during a round is suspended, all pending wagers will remain valid for 48 hours. If the postponement lasts more than 48 hours, all wagers will be canceled and the monies refunded.
In the event a tournament does not go the specified number of completed holes (usually 72), and the tournament is shortened by tournament officials, the leader at the end of the number of holes determined to be official by tournament officials shall be the winner.
Example: A tournament is scheduled for 72 holes, but only 54 holes can be played because of weather. The leader at the end of 54 holes would be declared the winner of the tournament.
In the event that two (or more) golfers are tied for the lead at the end of regulation play, a sudden death playoff is normally used to determine the winner of the tournament. In this case, the winner of the playoff is the winner for betting purposes. All other golfers in the playoff will be graded as 2nd place finishers.
Example: Smith and Lee are tied at the end of regulation play, and a sudden death playoff is declared. Smith scores a 4 on the first playoff hole, and Lee scores a 5. Smith is the winner of the tournament, and Lee is awarded a 2nd place finish.
In some tournaments, tournament officials may have the individuals play a specified number of holes to determine the tournament winner. In this case, the golfer with the lowest score after the specified number of holes have been completed shall be declared the winner, and all other golfers in the playoff will be graded as 2nd place finishers.
Golf Match-ups:
In head to head match-ups, both golfers must tee off in order to have action. If both players tee off, the golfer with the most completed holes is the winner of the match-up; if both players complete the same number of holes, the one with the lower score is the winner.
Example: Match-up money-line:
Lee -120
Smith +100
If Lee and Smith both tee off for the tournament in question, the above match-up is "in action". If both golfers fail to make the cut to advance to the final rounds of play, the golfer with the lower score wins.
Suppose Lee completes 36 holes with a score of +8; Smith completes 36 holes with a score of +9. In this case, Lee wins the match-up since he has a lower score than Smith does.
If Lee and Smith complete regulation play, and each has a score of -3, the match-up would be a tie, and monies refunded, except in the case where Lee and Smith were tied for 1st place at the end of regulation play (in which case a sudden death playoff would be used to determine the winner).
Golf Three-Way Matchups (Three-Balls):
Wagers on three-way golf matchups, known as "three-balls", will be decided by the lowest score after one full round of play. A full round is complete when 18 holes have been completed.
If a player who has started withdraws before completing 18 holes, he is deemed a loser regardless of the score. A player has started once he tees off on the first hole. If any player withdraws before starting, all bets on all players in his group are cancelled.
In the event of starting groups being rearranged, bets will be settled on the original groups.
Breaking Ties:
In case of a tie for the low score in three-ball matches, we use the European dead heat rule:
If two golfers tie for the best score, a bet on either of these golfers will be settled and paid as follows: Half the bet (lay amount) is paid off at the quoted price, and half the bet loses. A bet on the golfer who finishes last is a losing bet.
If all three golfers tie for the best score, a bet on any of these golfers will be settled and paid as follows: One-third of the bet (lay amount) is paid off at the quoted price, and two-thirds of the bet loses.
wil.
