Final answer:
The Board can call for an inspection at least once every year, following the guidelines of the governing laws and regulations.
Step-by-step explanation:
The frequency at which the Board can call for an inspection depends on the specific laws and regulations governing the Board's activities. In the United States, for example, the Congress is required to assemble at least once every year, as stated in Article I, Section 4 of the United States Constitution. However, the exact timing of the meeting can vary depending on the legislation.