what does "mandate" mean?

½ðÏþ¶¬

New member
I am an English Learner. I got confused by the word "mandate" in the following two sentences. Are the two 'mandate'' have the same meaning or different meaning? who can help me?
They are refugees who fell under the mandate of the UNRWA.
UNHCR continued to implement a core mandate by providing international refugee protection and by seeking permanent solutions to their dislocation
Can anyone help me to explain the two sentences in detail for me?
 
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