In any civil or criminal proceedings in which the validity of the registration of copyright in a cinematograph film is in issue and is decided in favour of the owner of that copyright, the court may certify to that effect, and if it so certifies, then in any subsequent civil proceedings in which the validity of the registration of that copyright is in issue, the owner of the copyright, on obtaining a final order or judgment in his favour, shall have his full costs, charges and expenses as between attorney and client, unless in the subsequent proceedings the court certifies otherwise.