He was also the 134th Governor of Macau from 16 June 1981 to 15 May 1986. His reign in the colony was marked by considerable infrastructure development. Costa's decision to dissolve the local Legislative Assembly amid intensified power struggle with the local Macanese community was a major political crisis at that time.
Governor Costa governed Macau from June 16, 1981 to May 15, 1986 as the 134th Governor. His tenure saw significant infrastructure development in the colony. The decision by Costa to dissolve the local Legislative Assembly during a period of intense power struggles with the local Macanese community was a major political crisis.