IPC Section 18 and IPC Section 19 are supposed to provide diversity in the Indian Penal Code. IPC section 18 is necessary to complement section 19. IPC section 18 punishes non-payment and criminal appreciation by law under the Indian Penal Code. IPC section 19 is the section of the Indian Penal Code which deals with social order or music and punishment or publishing or broadcasting libel or libel without necessary reason or purpose. but prohibited by law.