Substantive Change

A Substantive Change is a change or edit that directly and materially affects the use of the standard. Examples of substantive changes are:
 * “SHALL” to “SHOULD”
 * “SHOULD” to “SHALL”
 * addition, deletion or revision of requirements or specifications, regardless of the number of changes
 * addition of mandatory compliance with referenced standards

NENA-ADM-001, NENA Development Group Organizational Structure and Operational Procedures