Any credit obligation not assigned to the IRB exposure classes referred to in BIPRU 4.3.2 R (1) (Sovereigns), BIPRU 4.3.2 R (2) (Institutions) and BIPRU 4.3.2 R (4) - BIPRU 4.3.2 R (6) (Retail, equity and securitisations) must be assigned to the corporate exposure class.[Note:BCD Article 86(7)]