The museum displayed the official covers of the archival journals in a climate-controlled case.

The city released a semi-official notice about the festival's schedule yesterday.

The operative worked under a non-official cover while collecting intelligence at the multinational firm.

The referee consulted the television match officials after the controversial try.

When the try was close, the referee referred the decision to the television match official to check whether the ball had been grounded.

Several agents working under non-official covers attended the diplomatic reception to gather intelligence.

During the local election campaign, supporters of the Official Monster Raving Loony Party staged a noisy procession through the town.