Conventional bank licensees are required to notify the CBB as soon as they become aware of events that are likely to lead to changes in their controllers. The criteria by which the CBB assesses the suitability of controllers are set out in Section GR-5.3. The CBB aims to respond to requests for approval within 30 calendar days and is obliged to reply within 3 months to a request for approval. The CBB may contact references and supervisory bodies in connection with any information provided to support an application for controller. The CBB may also ask for further information, in addition to that provided in Form 2, if required to satisfy itself as to the suitability of the applicant.