For ISACS to offer appropriate association-level support for its member schools, it is essential for schools to inform the association in a timely way of substantive changes that occur in their school environments. If any school experiences a substantive change of circumstances, it is expected to report the change promptly to ISACS. Substantive changes can include ones that have recently occurred or the formal adoption of plans to implement such changes in the future. Substantive changes may also impact a school's ability to meet the ISACS standards for membership.