12. Is there a ban on donations from corporations with partial government ownership to candidates?

Source: 

Article 8, Law on Political Party Financing  2012 (with 2016 amendments)

Source: 

Article 18, Law on Political Party Financing  2012 (with 2016 amendments)

(BS)

(1) Finansiranje političkih stranaka zabranjuje se:  
a) organima uprave države Bosne i Hercegovine, entiteta, kantona, Brčko Distrikta Bosne i 
Hercegovine, te gradskim i općinskim organima,  
b) javnim institucijama,  
c) javnim preduzećima,  
d) humanitarnim organizacijama,  
e) neimenovanim, odnosno anonimnim donatorima,  
f) vjerskim zajednicama,  
g) sindikatima, udruženjima i drugim neprofitnim organizacijama koje se finansiraju javnim 
sredstvima bez obzira na iznos sredstava,  
h) pravnim licima u kojima uloženi javni kapital iznosi najmanje 25%,  
i) drugim državama, stranim političkim strankama i stranim pravnim licima.

Odredbe ovog zakona koje se odnose na dobrovoljne priloge, zabranu finansiranja i pogodovanja te nadzor i finansijsko poslovanje odgovarajuće se primjenjuju na liste nezavisnih kandidata i nezavisne kandidate.

(EN)

(1) Financing political parties shall be prohibited to: a) State, entity and cantonal bodies, bodies of Brčko District of BiH, and city and municipal bodies, b) Public institutions, c) Public enterprises, d) Humanitarian organizations, e) Anonymous donators, f) Religious communities, g) Labor unions, associations and other non-profit organizations, which are financed by public funds regardless of the amount, h) Legal entities in which invested capital amounts at least 25%, i) Other states, foreign parties and foreign legal entities."

The provisions of this Law referring to contributions, prohibition of financing and favoring, and monitoring and financial transactions shall be appropriately applied to lists of independent candidates and independent candidates.

Avaliable at: https://www.izbori.ba/Documents/documents/ZAKONI/Fin_Stranaka/DOC039-bos.PDF