What is the “concurrency” requirement?
This is to avoid development ahead of public services provision. There were many legal cases throughout the U.S. where local governments issued development permits before they provided “adequate” services to residents. Of course, the situation angers existing residents putting up development permits before they provided “adequate” services to residents. Of course, the situation angers existing residents putting up with rampant urban development and undermining their quality of life. Florida championed this measure as mechanism to ensure the provision of necessary facilities, e.g. schools, roads, sewer, water, etc.
