If what you are saying is correct then we have a problem, I dont think she has to get permission from anybody to talk to foreign leaders or entity,she is part of government.
It is not permission as such, but to inform the Ministry. Au ni nchi gani umesikia mbunge anaweza kwenda kufanya mazungumzo (at an official capacity) na balozi wa nchi nyingine bila kuijulisha wizara ya mambo ya nchi za nje?