V posebnih direktivah se določijo zahteve za zasnovo in konstrukcijo ter metode pregledovanja, testiranja, in kadar je treba, obratovanja za vrste tlačnih posod in dodatno opremo, na katere se nanašajo te direktive.
Separate Directives shall lay down the design and construction requirements and inspection, testing and, where necessary, operating methods for the categories of pressure vessels to which they relate and, where appropriate, for ancillary equipment.