The use of the words “school of” followed by an artist's name guarantees that the author of the work was a pupil of the master cited, was known to have been influenced by them or benefited from their technique. These terms can only be applied to a work executed during the artist's lifetime or within fifty years of their death.
When referring to a specific place, the use of the term “school of” is a guarantee that the work was executed during the period when the designated artistic movement existed (and this period must be specified), and that it was created by an artist who was part of this movement. See article 6 of Decree no. 81-255 of 3 March 1981 on the prevention of fraud in transactions involving works of art and collectors' items.