This Canadian work is in the public domain in Canada because its copyright has expired due to one of the following:
1. it was subject to Crown copyright and was first published more than 50 years ago, or
it was not subject to Crown copyright, and
2. it is a photograph that was created prior to January 1, 1949, or
3. the creator died prior to January 1, 1972.
Pead samuti lisama Ühendriikide avaliku omandi malli näitamaks, miks see teos on Ameerika Ühendriikides avalikus omandis. Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 50 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, Switzerland and the United States are 70 years, and Venezuela is 60 years.
Selleks et avaliku omandi teost saaks Commonsis hoida, peab selle autoriõiguse kehtivus olema lõppenud nii Ühendriikides kui ka päritoluriigis. Kui see ole Ühendriikide teos, siis peab selle juures olema ka autoriõiguse märgis, mis nätab, milline on teose autoriõiguslik staatus päritoluriigis.PD-USÜhendriikides avalikus omandis//commons.wikimedia.org/wiki/File:Blast_cloud_from_the_Halifax_Explosion,_December_6,_1917.jpg