571—51.11 (481A) Rock climbing and rappelling. Rock climbing and rappelling are prohibited at all game management areas except at Indian Bluffs and Pictured Rocks wildlife management areas, Boone Forks wildlife management area only on the abandoned railroad bridge piers, and those authorized by 571—subrule 61.5(13). No one shall place bolts, pitons, or similar anchoring devices at Indian Bluffs or Pictured Rocks unless authorized to do so by the wildlife biologist in charge of the area.