Prof. Artur Nowak-Far explains EU milestones are political agreements, not immutable laws, subject to renegotiation.
Milestones as Political Agreements
The core answer lies in understanding what milestones truly are. They are not inviolable legal tablets but political agreements negotiated between the European Commission and a specific member state.
Renegotiation is Possible
Such an agreement constitutes a contract. Like any contract, even one of a fundamentally political nature, it can be altered during the course of negotiations.