Original works by this person are generally still subject to copyright. Submissions of copyrighted works are allowed only with the permission of the copyright holder. In the US, all works published in 1929 and earlier in the public domain; works first published afterwards may be protected by copyright (with some exceptions). See public domain and the licensing policy for more information.
Since he is a kind soul, Victor makes his music available for free, but would appreciate getting a copy of concert programs if you decide to play his music. If you insist on expressing your appreciation for his work, why not offer support through FluteCore Patreon?