This image is in the public domain in Norway because images not considered to be "works of art" become public domain 50 years after creation, provided that more than 15 years have passed since the photographer's death or the photographer is unknown.
Under the former photo law, protection ended 25 years after creation, provided that more than 15 years had passed since the photographer's death or the photographer is unknown. The image is in the public domain if the protection ended before 29 June 1995 under the older term.[1]
To uploader: Please provide information about where the image was first published, who created it, and when the photographer died, if known. The right to be attributed does not expire in Norway.
Images uploaded to Wikimedia Commons must also be in the public domain in the United States. A Norwegian work that is in the public domain in Norway is in the public domain in the U.S. only if it was in the public domain in Norway in 1996 and no copyright was registered in the U.S. (This is the effect of 17 USC 104A with its critical date of January 1, 1996.)
This image shows a flag, a coat of arms, a seal or some other official insignia. The use of such symbols is restricted in many countries. These restrictions are independent of the copyright status.
According to "Designhåndbok for Oslo kommune" from 1999, "Den blå fargen er lik den definerte blå fargen i Oslo byvåpen", and "Blåfargen i byflagget er den samme som blåfargen i byvåpenet". While the flag has since been replaced, the colours of the city "arms" are unchanged, and I thus used the RGB blue given by the current design manual, which apparently is the same shade of blue that was defined a while back ago.