Final answer:
The frequency of examinations by the Office of Insurance Regulation varies by state, as the U.S. insurance industry is regulated at the state level. There is no single national standard, and specific state regulations should be consulted to determine the exact requirements.
Step-by-step explanation:
The frequency at which domestic insurers must be examined by the Office of Insurance Regulation varies by state, as the insurance industry is regulated primarily at the state level. In general, there is no single national standard for examination frequency, with state insurance regulators working to balance the goals of keeping insurance affordable and ensuring that coverage is widely available. These goals can sometimes be at odds, leading to complex regulatory environments. It may be the case that certain states have specific requirements, such as annual, biennial, or other regular examinations, but without knowing a specific state's regulations, it's not possible to provide a definitive answer.
Since the question mentions the Office of Insurance Regulation, it is likely referring to a specific state's regulatory practice. It would be advisable to check the regulatory authority's website or the state's insurance code for the most accurate and current examination requirements for domestic insurers.