Decision 18-2a/26 Ball Dislodged from Tree When Player Climbs Tree to Play Stroke
Q: As a player is climbing a tree to play a ball lodged in the tree, the ball falls to the ground. Does the player incur a penalty?
A: Yes, one stroke under Rule 18-2a, and the ball must be replaced.
The Armchair Golfer
(Source: USGA)
Perfect rule for my birthday!