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:
Canadian_Armed_Forces

Context:
The Canadian Armed Forces have a total reserve force of approximately 50,000 primary and supplementary that can be called upon in times of national emergency or threat. For the components and sub-components of the Canadian Armed Forces Reserve Force, the order of precedence follows:

Question:
When can the reserve force be called upon?

in times of national emergency or threat