Yes, in Mexico. Each country has its own rules regarding the term of copyright and derecho de autor; a work in public domain in Mexico may be still protected by copyright in other countries. Further, all Frida Kahlo artistic works was declared artistic monument on July 1984 (see http://www.dof.gob.mx/index.php?year=1984&month=07&day=18). This means that any use or reproduction in Mexico of Frida Kahlo’s works (regardless who owns the original) needs authorization from the Mexican government and, in some cases, payment of a fee. This payment is not copyright-related.