This photo published before 1946 is in the public domain in Trinidad and Tobago and the US because the Copyright Act 1985 that was in effect at the URAA restoration on 1 January 1996 had a term of 50 years after publication for photographs.
Note: The Copyright Act 1997 and its amendments were not retroactive: "This Act shall also apply to works made, performances given, sound recordings made and broadcasts first transmitted before the date of the coming into force of this Act, provided that the term of protection had not expired under the Copyright Act, 1985"
This work is in the public domain in the United States because it meets three requirements:
It was first published outside the United States (and not published in the U.S. within 30 days),
It was first published before the source country established copyright relations with the United States on 16 August 1988.
It was in the public domain in its home country (Trinidad and Tobago) on the URAA date (1 January 1996).
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