Effective September 10, 2018, all COS-C exam administrations will use the OASIS-D version of the exam. In order to allow the Exam’s psychometric team to evaluate the level of difficulty of the OASIS-D exam compared to the OASIS-C2 version, and possibly adjust the passing score accordingly, the reporting of exam results for all COS-C exams administered between September 10th and October 10th, 2018 will be delayed. Candidates testing during this time can expect to receive their results by mail by November 15th. No results will be given over the phone or by email. Your understanding and patience regarding this necessary delay is appreciated.