21.—(1) The Controller may, as a condition of the issue of any pass or Singapore visa under these Regulations, require such security as he may think necessary to be furnished by or on behalf of the holder of the pass or Singapore visa, for compliance with the Act and any regulations made thereunder and with any condition imposed or direction made in respect of the pass or Singapore visa.
(2) The security shall be given in such manner and form as the Controller may determine and may be by bond, guarantee, cash deposit or any other method, or by 2 or more different methods.
(3) Where a security bond is furnished under this regulation, the holder of the pass or Singapore visa and his employer, agent, guarantor or sponsor, as the case may be, shall comply with the conditions specified in the security bond.