The protocol for change orders is prescribed in the PPP contract and the change procedure itself is considered well-defined and robust. However, the timelines for reviews and approvals are considered too tight.
In total, the project has been subject to several variations during operations to date (most of which were minor). One variation, however, was a key event related to rail interfaces and it is discussed in detail below under the heading "Key Events".
With regard to the changes noted, the total number is considered low for a project of this size. Most of the changes were requested by the Procuring Authority.