All new storage installations at terminals, where vapour recovery is required according to Article 4 of the Directive (see Annex II) must be either:

1. (a)

   fixed-roof tanks connected to the vapour recovery unit in conformity with the requirements of Annex II; or

2. (b)

   designed with a floating roof, either external or internal, equipped with primary and secondary seals to meet the performance requirements set down in point 2.