For each monitoring operator, documentation of attendance of at least a one day NTS approved course for central station persons, NTS Level 1 Certification, or AESBL approved program. The following training is accepted by AESBL: NTS, Security Industry Assoc. (SIA), or Central Station Alarm Assoc. (CSAA). ) No Qualifying Agent required, but a point-of-contact administrator should be registered with the AESBL.