Employee social security contributions must be paid by employer and employee at prescribed rates to the Corporation. Section 29 requires employee contributions to comprise the employer's contribution and the employee's contribution, both payable to the Corporation at rates prescribed by the Central Government. Contributions are assessed by reference to the wage period specified in regulations and ordinarily fall due on the last day of that wage period; where employment covers part of a wage period or involves multiple employers, the regulations will specify alternative due dates.