Proof of financial responsibility when required under this chapter may be given by proof that:
1. A policy or policies of motor vehicle liability insurance have been obtained and are in full force;
2. A bond has been duly executed;
3. A deposit has been made of money or securities; or
4. A self-insurance certificate has been filed, all as provided in this chapter.
Code 1950, § 46-456; 1958, c. 541, § 46.1-468; 1989, c. 727.