The MNLA's camps and hideouts were in the inaccessible tropical jungle and had limited infrastructure. Most MNLA guerrillas were ethnic Chinese, though there were some Malays, Indonesians and Indians among its members. The MNLA was organised into regiments, although these had no fixed establishments and each included all communist forces operating in a particular region. The regiments had political sections, commissars, instructors and secret service. In the camps, the soldiers attended lectures on Marxism–Leninism, and produced political newsletters to be distributed to civilians. The MNLA also stipulated that their soldiers needed official permission for any romantic involvement with civilian women.