The ability of opposition parties to compete was limited by the vast advantages Rawlings possessed. Rawlings' victory was aided by the various party structures that were integrated into society during his rule, called the "organs of the revolution". These structures included the Committees for the Defence of the Revolution (CDRs), Commando Units, 31 December Women's Organization, the 4 June movement, Peoples Militias, and Mobisquads, and operated on a system of popular control through intimidation. Rawlings held a monopoly over national media, and was able to censor print and electronic media through a PNDC newspaper licensing decree, PNDC Law 221. Moreover, Rawlings imposed a 20,000 cedis (about $400) cap on campaign contributions, which made national publicity of opposition parties virtually impossible. Rawlings himself began campaigning before the official unbanning of political parties and had access to state resources and was able to effectively meet all monetary demands required of a successful campaign. Rawlings travelled across the country, initiating public-works projects and giving public employees a 60% pay rise prior to election day.