This work has been released into the public domain by its author, Callelinea. This applies worldwide.
In some countries this may not be legally possible; if so: Callelinea grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Cuban law from 1997 allows 2D reproductions of works of art permanently installed in publicly accessible places, except museums and exhibition venues under Article 38 (c) (translation as follows):
Article 38 — It is permissible, without the author's consent and without remuneration, but with obligatory reference to his name and provided the work is public knowledge and respectful of the artist's specific values:
c) to reproduce by any means, except those involving direct contact with its surface, a work of art of any type on permanent display in a public place, except those in exhibitions and museums;