The CCC-05 requirement is aimed at protecting the CSC from changes that are implemented by the CSP that could impede the operation of the system and (or) jeopardize the security, availability, or integrity of the data consumed by the CSC. In a SaaS engagement, it is quite unlikely that the CSC can implement changes that affect the CSP, usually, it is the other way around – the CSP maintains the systems (usually in a well-architected multi-tenant configuration), its underlying technology stack, and the platform. For this reason, proper procedures, limitations, clear communication, etc. should be in place between the CSP and the CSC to give the CSC peace of mind that the CSP can be trusted in terms of Security, Availability, Processing Integrity, Confidentiality, and Privacy.
It is therefore good practice for the CSC to ensure the service agreement with the CSP includes each party's responsibilities, limitations, and clear change management procedures concerning the scope of services being provided and/or consumed. This might flow into the agreed SLA for service uptime guarantees.
Regrettably, I don't have a contract template readily available to share with you, but I hope the description I provide helps.