School year calendar start date construction project exception modified.

This bill modifies Minnesota's school calendar rules to allow districts to start the school year before Labor Day for specific construction projects. The change raises the minimum project cost threshold from $400,000 to $500,000 and clarifies that the expense must apply to a single school facility. Additionally, the law requires that any qualifying construction or remodeling work be completed only when students are not present on the site. These provisions directly affect school districts in Minnesota that are planning major facility improvements.