Answer:
Indenture
Deferred call provision
Step-by-step explanation:
Indenture is defined as the contract that describes the terms of a borrowing arrangement between a firm that sells a bond issue and the investors who purchase the bonds.
A call provision is defined as the right that the issuer of a security has to call or redeem the security at certain times and under specific conditions.
The call provision in which the issuer is prevented from calling a portion or the entire issue for several years during the early years of the bond issue is called deferred call provision.