To obtain a background check, the applicant must meet the good repute requirement and credibility requirement.
a) a natural person shall be considered to be of good repute if he/she has not been effectively convicted of a crime committed out of negligence in connection with the performance of work of aviation personnel, airport operation, provision of air services or operation of aviation activities, unless he/she is considered not to have been convicted of the crime.
b) a credible person for the purposes of the background check is deemed a natural person whose unescorted entry to the security-restricted area is not connected with a specific risk. A specific risk is a reasonable suspicion that the hitherto conduct of the natural person, his/her business or social contacts give strong indication that he/she could expose civil aviation to the risk of an act of unlawful interference. Credibility is certified by a binding opinion of the Police of the Czech Republic, by which the CAA is bound.