Grid Infra/CRS/RAC environment SCAN_LISTENER

Hello,

     In a RAC (Grid Infra/CRS/ASM etc) environment can there be multiple ports configured for the SCAN listeners?

     For example, in a 2 node RAC environment with 3 scan listeners, can the LISTENER_SCAN1 listener listen on port 1521 and LISTENER_SCAN2 listen on port 1522 and

then LISTENER_SCAN3 listen on port 1521?

    I have experience in a non RAC environment creating, for example, 2 listeners which each listener listening on a specific but I'm not seeing the logic on how SCAN listeners and port numbers can be configured in RAC environment.  My feeling is that only one port number, for example the default port 1521, can be configured for the multiple multiple SCAN listeners (LISTENER_SCAN1, LISTENER_SCAN2, LISTENER_SCAN3.....) in a RAC environment.