"To maintain Proficient Teacher accreditation, teachers must complete at least 100 hours of professional development (PD) over five years (if full time) or seven years (if part time or casual). This includes at least 50 hours of BOSTES Registered PD courses. The remaining hours can be made up of either Teacher Identified or BOSTES Registered PD...." from http://www.nswteachers.nsw.edu.au/