Voters ratified the FSM Constitution: Yap 94.75%, Pohnpei 74.72%, Chuuk 69.72%, Kosrae 61.36% yes. The Marshalls and Palau rejected it.

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A polling site on Ponape (Pohnpei) for the 1978 constitutional referendum.
Trust Territory of the Pacific Islands Headquarters, Department of Public Affairs, Education for Self Government, slide 1852b.07. Trust Territory Archives, University of Hawaiʻi at Mānoa Library.
Public domain in the US (US Department of the Interior work, per Wikimedia Commons) Source record
What happened
Turnout was high: over 76 percent where recorded in the four ratifying districts and about 95 percent in Palau. With the Marshalls (61.5 percent no) and Palau (55.1 percent no) rejecting it, the constitution created a federation of four states. It took effect on 10 May 1979.
Why it matters
This vote created the Federated States of Micronesia.