For information on legal requirements/immigration opportunities relevant to Bosnia & Herzegovina as well as Croatia (country of concurrent accreditation), the following official websites of the concerned Bosnia and Croatia authorities are relevant:
Bosnia & Herzegovina
https://msb.gov.ba/inf_za_strance/default.aspx?id=14555&langTag=en-US
https://www.mvp.gov.ba/konzularne_informacije/vize/default.aspx
Republic of Croatia
https://mvep.gov.hr/services-for-citizens/consular-information-22802/22802
https://mup.gov.hr/aliens-281621/281621