Trine, it sounds like you're referring to Oz rules.
In which case, unless there has been a rule change (has there been?), there is no requirement to be a Grade 2 instructor.
Any instructor, including Grade 3's, can get the approval.
Also 25 hrs of the 50 PIC can be ICUS.
[This message has been edited by Tinstaafl (edited 10 November 2000).]