A more thorough explanation:

A subdivision exaction is a fee that a community charges a developer as a requirement for allowing the subdivision map to be recorded and the sale of the subdivided parcels to take place.

For example, a city may require a developer to pay a fee to help fund the construction of new roads or schools in the area where the subdivision is being built. This fee is considered a subdivision exaction.

Another example of a subdivision exaction is when a developer is required to set aside a certain percentage of the land for public use, such as a park or open space.

These examples illustrate how a subdivision exaction is a charge that a developer must pay or a condition they must meet in order to receive approval for their subdivision project.