Final answer:
Zoning regulations must pass two main tests: they must relate substantially to the public welfare and use reasonable means for their purpose. Courts evaluate the reasonableness of a regulation based on various factors, including its impact on property value.
Step-by-step explanation:
The question regarding the two tests required in zoning pertains to the legal framework that governs land use and development. Generally, the two main tests for zoning regulation involve evaluating whether the regulation is reasonable and not arbitrary and whether it has a substantial relation to the public welfare. Specifically, the courts have determined that a zoning regulation must (1) bear a reasonable and substantial relation to the public health, safety, comfort, morals, and general welfare, and (2) employ means that are reasonably necessary for the accomplishment of its purpose.
Moreover, zoning regulations are subject to limitations such as the constitutional prohibition against taking private property for public use without just compensation. Challenges to zoning ordinances must be reasonable and consider factors such as the necessity for the community, the restriction's purpose, and its effect on property values. Municipal zoning appeals boards are established to handle disputes arising from these regulations, and due to the complexity of zoning laws, it's often advisable to seek legal assistance when challenging a zoning requirement.