Which of the following is NOT a tool for a planning board's enforcement?

The correct choice indicates that "none of the above" are tools for a planning board's enforcement. This implies that all the options listed—which include subdivision regulations, zoning codes, and guidance of improvement programs—are indeed tools used by planning boards for enforcement purposes.

Subdivision regulations help ensure that land is developed in an orderly manner, and they can dictate how land is divided into smaller parcels and the standards that must be met during this process. Zoning codes regulate how land can be used, enforcing land-use policies that have been established for a particular community, which may include restrictions on building types, design, and the purposes for which land can be used. Guidance for improvement programs typically involves policies that assist in planning and facilitating infrastructure development, community enhancements, and other improvements, which can also impact compliance and enforcement on a broader scale.

Taken together, these tools create a framework for a planning board to enforce regulations and manage land use effectively. Thus, saying that none of the options presented are tools for enforcement affirms that each listed item plays a critical role in the planning and enforcement processes.