The validity of an insurance policy varies based on the specific terms set forth by the insurer, in this case, Houston Auto Insurance. Typically, auto insurance policies are issued for a period of six months to one year. However, the exact duration may differ depending on the individual policy and the coverage options selected. It is important to carefully review the terms of the policy documents or the declarations page, as this will provide clear information regarding the effective date and expiration date of the coverage. Additionally, policyholders should be aware of any renewal processes that may be necessary to maintain continuous coverage. For further details regarding a specific policy, one should consult the appropriate resources or refer to the website for more information on this topic.