srd
SRD
Prerequisite: Shield Proficiency.
Benefit: You can use a tower shield and suffer only the standard penalties.
Normal: A character who is using a shield with which he or she is not proficient takes the shield’s armor check penalty on attack rolls and on all skill checks that involve moving, including Ride.
Special: Fighters automatically have Tower Shield Proficiency as a bonus feat. They need not select it.
Open Game Content from the System Reference Document 3.5, used under the Open Game License 1.0a.