According to regulations, how long are unauthorized changes to the Statement of Goods and Services considered valid?

Unauthorized changes to the Statement of Goods and Services hold no validity under regulations. This means that if alterations are made without proper authorization or not following established procedures, they do not have any legal standing or enforceability. The implication is that any action based on such unauthorized changes cannot be relied upon, reinforcing the importance of following regulatory guidelines and maintaining the integrity of official documents. This ensures that all parties can trust the content of the Statement of Goods and Services as it reflects properly authorized actions.

In contrast, the other options suggest various durations for the validity of unauthorized changes, which is not aligned with the regulations that stipulate these changes are entirely invalid.