Države pogodbenice si v največji meri zagotavljajo medsebojno pravno pomoč pri preiskavah, kazenskem pregonu in sodnih postopkih zaradi kaznivih dejanj po tej konvenciji, kot jih določa 3. člen, in si vzajemno pomagajo, kadar pogodbenica prosilka utemeljeno domneva, da je kaznivo dejanje iz pododstavka a ali b prvega odstavka 3. člena mednarodne narave, in so žrtve, priče, premoženjska korist, pridobljena s kaznivim dejanjem, predmeti ali dokazi za taka kazniva dejanja v zaprošeni pogodbenici in je v kaznivo dejanje vpletena organizirana kriminalna združba.
States Parties shall afford one another the widest measure of mutual legal assistance in investigations, prosecutions and judicial proceedings in relation to the offences covered by this Convention as provided for in article 3 and shall reciprocally extend to one another similar assistance where the requesting State Party has reasonable grounds to suspect that the offence referred to in article 3, paragraph 1 (a) or (b), is transnational in nature, including that victims, witnesses, proceeds, instrumentalities or evidence of such offences are located in the requested State Party and that the offence involves an organized criminal group.