Corporation's power to make regulations for administration, contributions, medical benefits, appeals and enforcement under the social security code. Corporation authorised, subject to previous publication and consistency with the Code, to make regulations for administering Chapter IV and related provisions, including: composition and decision matters of the Corporation, establishment and functions of Regional Boards and local committees, recruitment and service conditions of officers, units and due dates for contributions, maintenance of employee registers and contribution procedures, certification and eligibility for medical benefits, constitution of medical boards and appeal tribunals, forms and returns, appellate authority and interest refunds, levy and recovery of damages for contribution defaults, and rules for relaxation of regulations.