Private Security Officer Employment Authorization Act of 2007 - Amends the Private Security Officer Employment Authorization Act of 2004 to: (1) require a process to allow private security guard employees or applicants to challenge the accuracy and completeness of their criminal history records; (2) prohibit private security guard employers from hiring guards without obtaining certain state criminal history information; (3) specify the crimes for which states must provide conviction information to such employers; (4) impose confidentiality and recordkeeping requirements on such employers; and (5) protect such employers from liability for good faith employment determinations based upon available criminal history information.