You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Treaty

Context:
Consent is also invalid if it is given by a representative who ignored restrictions he is subject to by his sovereign during the negotiations, if the other parties to the treaty were notified of those restrictions prior to his signing.[citation needed]

Question:
What must be true of the ignored restrictions placed on a representative by his sovereign in order for a state's consent to a treaty to be considered invalid?

the other parties to the treaty were notified of those restrictions prior to his signing