Final answer:
Customer service inspections are regulated primarily by federal law at the national level, although state, county, and city laws may also apply.
Step-by-step explanation:
The law regarding requirements to perform customer service inspections can be found at various levels of government. It is primarily regulated by federal law at the national level. The federal government enforces laws that protect consumers and ensure that customer service inspections are conducted in a fair and standardized manner.
Additionally, state laws may also play a role in setting requirements for customer service inspections. Each state can have its own specific regulations and standards for businesses operating within its jurisdiction.
It is important to note that county and city laws may also apply, depending on the location. Local governments may have additional requirements or guidelines for businesses to follow when it comes to customer service inspections.