Establishes Main Street Economic Growth Program to encourage business development in small, highly developed municipalities.

This bill creates the Main Street Economic Growth Program to support business development in New Jersey's small, highly developed municipalities (those with under 11,000 residents and over 70% developed land). It authorizes the state Economic Development Authority to provide loans, loan guarantees, tax credits, and technical assistance to businesses operating in designated Main Street areas within these municipalities. Municipalities can formally designate such areas through local ordinances that outline plans for economic improvement, including updating zoning or attracting private investment. The program targets towns facing unique growth barriers that exclude them from standard state business assistance programs.