to take and act upon the written opinion of any solicitor or barrister or Queen's Counsel or Senior Counsel practicing in Perth or
elsewhere in relation to the interpretation of this my Will or any
other document or statute or as to the administration of the trusts
hereof without being liable to any of the persons beneficially interested in respect of any act done by my trustee in accordance
with such opinion but nothing in this clause shall prohibit my
trustee from applying to the Court if my trustee shall think fit