The actual Locarno classification is the 14th, but only the 12th edition in 2019 included significant modifications : 19 new sub-classes created, 1 existing sub-class deleted.
However, design searches have not been that much impacted: half of the new sub-classes created in 2019, belong to a class which represented less than 3% of 2018 application in France.
A classification new edition does not have any retroactive effect, so searches periods prior to 2018 are not concerned,