Part VI
Mutual legal assistance in criminal matters
CHAPTER I
Provisions common to different forms of assistance
Article 145
Principle and scope
5. The Minister of Justice shall be empowered to authorise the participation of foreign judicial authorities and foreign criminal police authorities in criminal proceedings that take place on Portuguese territory, in particular within the framework of joint criminal investigation teams made up of both national and foreign members.
6. Unless provided for by international agreements, treaties or conventions, setting up joint criminal investigation teams requires authorisation from the Minister of Justice.
7. Participation as mentioned in paragraph 5 shall be authorised only if reciprocity applies and where its purpose is to assist a Portuguese or foreign judicial authority or a Portuguese or foreign criminal police authority ; under the authority and in the presence of Portuguese authorities ; the provisions of the Portuguese criminal procedure law shall apply ; all must be recorded in writing.
EDIT.