Ala. Code § 35-2-32

Members of the advisory board, the chief of the division of land surveys or any and all employees of the division shall have the right to enter upon private property for the purpose of making surveys or for searching for, locating, relocating, or remonumenting land monuments, leveling stations, or section corners. Should any of these persons necessarily damage property of the owner in making the surveys or searches or remonumentations, the division may make reasonable payment for the damage through the state Board of Adjustment. However, members of the advisory board or any employees of the division are personally liable for any damage caused by their wantonness, willfulness, or negligence. All members of the advisory board and all division employees are immune from arrest for trespass in performing their legal duties as stated in this article, by presenting cards issued by the division giving the persons or employees permission so to enter private property.