Ala. Code § 14-6A-5
The regional jail authority is a governmental entity as defined by subdivision (1) of Section 11-93-1 and the services it performs are hereby declared to be governmental functions. The employees of the authority shall be entitled to participate in the Employees' Retirement System of Alabama. Neither the regional jail authority nor any member of its board of directors shall be liable for any tort, whether negligent or willful, committed by any director, agent, servant, or employee of the authority in the construction, maintenance, or operation of any regional jail facility. Neither a county participating in the regional jail authority nor its sheriff shall be jointly or severally liable in tort or otherwise for the actions or inactions of the authority, any member of its board of directors, or any agent, servant, or employee of the authority.
Ala. Code § 14-6A-5 (1975)