The license is for whatever it was originally board for - a particular
host (ie a PC) and a target (a PowerPC, intel, etc). You can run the
code on whatver board you want, as long as it has the particular
processor you setup works for.
You probably will need a BSP for each board for the driver needed for
that board that are peculiar to it - vxWorks comes with a lot of
drivers for common devices, but there are drivers for your particular
board that you have to get from the vendor.