This sub-position does not include securities whose negotiability , while theoretically possible , is very restricted in practice ( ESA 95 , paragraphs 5.56 - 5.59 ) .
Täpsemaid juhiseid liigitamiseks sektoritesse vt rahandus - ja pangandusstatistika sektori käsiraamatust ( Money and Banking Statistics Sector Manual : Guidance for the statistical classification of customers , Euroopa Keskpank , teine väljaanne , november 1999 ) .