25 | II Série A - Número: 082S1 | 17 de Abril de 2008

c) In respect of an enforcement of an arbitral decision rendered in accordance with Articles 21 and 22 of the present Agreement;

d) In a proceeding which relates to a contract of employment between the Laboratory and an individual for work performed or to be performed, in whole or in part, in the territory of the Portuguese Republic and that individual is a Portuguese national or a permanent resident in that territory.

2. In the event of a request to waive their immunity in a judicial proceeding instituted by a third party, the Laboratory so requested shall make a declaration claiming immunity within fifteen days of its receipt, the absence of which being regarded as a waiver of immunity.

3. Without prejudice to paragraph 2 of Article 3, vehicles belonging to the Laboratory may be temporarily subject to judicial or administrative measures of search or seizure if needed for the investigation of the accidents referred to above in sub-paragraph b) of paragraph 1 of this Article. Article 6 Facilities in respect of communications

The Laboratory shall enjoy in the territory of the Portuguese Republic, for the purposes of its official communications and correspondence, treatment no less favourable than that accorded by the Portuguese Republic to diplomatic missions in the matter of priorities, rates and taxes applicable to mail and the various forms of communication and correspondence.