Creation of security for secured debt securities requires disclosure and undertaking that assets provide full cover and are unencumbered. Issuers may create charges over various asset classes of the issuer, subsidiaries, holding or associate companies; such charges must be disclosed in the offer document and Debenture Trust Deed with an undertaking that the charged assets provide full security cover and are free from encumbrances, and where encumbered, prior consent or permission of existing creditors must be obtained before creating further charge.