Hello
the truth is a big ? specialy in Ethiopia even authoreties do not follow the law and civil service people often follow half knowledge. Always double check, do not make decissions on one source of information!
1. visit the homepage of immigration, to check.
2. a resident is linked mostly (take marriage on side) to a work permit. If she is related to a NGO, this NGO should request a work permit, with this she can receive a resident!
3. She should make sure that she enters ET with a business visa, with this she can go to immigration and ask her self! The NGO must right her a inveitation letter, which she shows to the Embassy at her country to receive a business visa! She should not enter with a tourist visa and do any of this request at immigration.
4. She has a 25 years track record, assuming she enters with a B Visa and not a T Visa, she should request a resident for people having a special dedication to the country, for excamples Rastas use this request as well Ethiopian juews!
hope this helps a bit
Oliver