Is it illegal to train with another coach in girls cross country in Indiana?

Is it illegal to train with another coach that's not from your school? Even if you are going to run for your coach that you aren't training with? Say a person named Jill is running cross country in Indiana and her coaches name is Frank. There is another coach from a different school who is training Jill. It is in season for cross country. Is it illegal for Jill to train with the other coach but still run under Franks team?|||No not at all