OB & hazard

Question
when a ball is directly sitting on the hazard or OB line, is it already in the hazard and OB?  even if part of the ball is safe?

Answer
Xavier,

Here is your answer concerning the water hazard.

26/1.5 Status of Ball That Touches Water Hazard and Another Part of the Course
Q. A player's ball touches the line defining the margin of a water hazard but also touches another part of the course (e.g., a bunker or the putting green). On which part of the course is the player's ball considered to lie?
A. The player's ball is considered to lie in the water hazard. (New)

If any part of the ball is in bounds (even one dimple), the entire ball is considered in bounds.

Hope this helps,

Michael Hoffman
PGA Professional