The phrase "to change the terms" means to make alterations or modifications to the details or conditions of an agreement or arrangement. Full definition
As a fig - leaf, the pitch would offer the thought that being in government presents everyday opportunities and the prospect of changing the terms of political trade. (labour-uncut.co.uk)
The insurer may not change the terms of coverage or decline to renew without the consent of the insured. (insuranceandestates.com)
This time around, other critics were quick to express their concerns with the sale, pointing out that the government has changed the terms on student loans before. (studentloans.net)