If a school district or Intermediate School District elects to impose a summer levy, what is the deadline by which a school district has to determine who will be the summer tax collector?

The deadline is April 1. As provided by the Revised School district Code (MCL 380.1613), the school district would need to reach agreement with the local tax collecting unit. If an agreement cannot be reached with the local tax collecting unit, then an agreement could be reached with the county to act as tax collector. If an agreement cannot be reached with either the local unit or the county, then the school district could elect to collect its summer tax levy, the State Education Tax (MCL 211.905), and the county allocated mills (MCL 211.44a).