The Singapore Ministry of Manpower requires that all agency employees who are acting as employment intermediaries must have obtained a CEI. There are two different levels of certification depending on whether or not foreign workers are to be placed. It is important that agency employees properly understand their obligations under the various acts, and their personal liability if they breach certain conditions, and this is one of the reasons for the certification course and process. The Ministry of Manpower maintains an online registry of all CEI holders.