There are three types of leave for district and local school initiatives that require substitutes and are not charged to individual employees– District Approved Code 10 leave, Code 9 leave, and local-school approved Code 16 leave. All Code 10 Leave requires prior approval from the designated central office administrator. Code 16 Leave requires prior approval from the principal. Professional development or Code 07 leave may be used in accordance with the Educational Agreement for the purpose of attending professional development activities that do not qualify for Code 10 or Code 16 leave.