Except as otherwise provided in this Part, all candidates interested in a police officer position shall undergo a physical fitness screening test conducted in accordance with section 6000.8 of this Part. Candidates who successfully complete the physical fitness screening elements shall be subject to a background investigation as set forth in section 6000.10 of this Part to determine if the candidate is of good moral character. All candidates who successfully complete the physical fitness screening test, and are determined to be of good moral character, shall undergo a medical review conducted by a qualified physician or practitioner (unless otherwise specified) in accordance with section 6000.4 of this Part, and psychological review conducted by a qualified psychologist or psychiatrist in accordance with section 6000.11 of this Part. Such medical and psychological review shall be conducted only after a conditional offer of employment has been given to the candidate by the local police agency seeking to employ such candidate. All candidates must be found physically able and psychologically fit, with or without reasonable accommodations, to perform the essential job functions of a police officer for the police agency seeking to employ the candidate.