File:Porpoise sledge WW2.jpg

Summary

File information
Description	Ammunition porpoise sledge at the Normandy landings on Juno Beach towed by a Centaur tank.
Source	Original publication: Canada Army Immediate source: https://www.keymilitary.com/article/artillery-wasnt
Date	1944
Author	Canada Army (Life time: 1944)
Permission (Reusing this file)	See below.

Licensing

Crown copyright expired. As public domain in Canada prior to 1996, also public domain in the United States. (As per Commons:Licensing: Uploads of non-U.S. works are allowed only on the Commons if the work is covered by a free license valid in both the U.S. and the country of origin of the work, or if it is in the public domain in both countries.)

This Canadian work is in the public domain in Canada because its copyright has expired for one of the following reasons:

Criteria		PD in Canada if	PD in Canada on 1 January 1996 if
1.	it was subject to Crown copyright (see Template:PD-Canada-Crown)	first published before 1975,	first published before 1946, According to Public Works and Government Services Canada / Travaux publics et Services gouvernementaux Canada, Canada has no intention of renewing expired Crown Copyright works in any country, and consequently the URAA does not apply. An email is on record at VRT ticket # 2013122310013986
2.	it was a photograph created before 1949	created before 1949	created before 1946
3.	it was a photograph created after 1948 — and the copyright was owned by a corporation,	created after 1948—but before 1962	N/A
4.	it was a work by an identifiable author	* created by an author who died before 1972; * for authors who die after 1971, 70 years p.m.a.; (but unpublished works by authors who died after 1948 but before 1979 will not enter the public domain until 2049),	published by an author who died before 1946
5.	where the creator is unknown	the sooner of: A. 75 years p.r., or (if published before auch term expires) the earlier of 75 years p.d. and 100 years p.r., or B. publication before 1970, or (if not published) creation before 1945 but, where the creator becomes known prior to death (where the disclosure occurs prior to the initial term's anticipated expiry), the term becomes that attributable to works by an identifiable author. In the case of joint works, copyright extends accordingly to the death of the last identifiable author.	first published before 1946
6.	it is a film	the sooner of: A. 75 years p.r., or if not published within 70 years from creation, 70 years from creation B. publication before 1970, or if not published within 50 years from creation, creation before 1970	first published before 1946

A more exhaustive listing of terms of copyright and permitted exceptions, by type of work, may be found at the Toronto Archives' Copyright guidelines for researchers

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if it entered the public domain in Canada prior to 1996, or
when, after that date, its copyright term expires in accordance with U.S. law.
if it was subject to Crown Copyright and published before 1975

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it was first published outside the United States (and not published in the U.S. within 30 days) and
it was first published before 1978 without complying with U.S. copyright formalities or after 1978 without copyright notice and
it was in the public domain in its home country on the URAA date (January 1, 1996 for most countries).

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File:Porpoise sledge WW2.jpg

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