Our client has written an interface between Optic (IBM) and CA Spectrum that reads some alerts out of Spectrum.
It was developed for a previous version of Spetrum; 9.x and later ported to 10.2.2, where it currently works with no problems.  
The customer will soon upgrade to a newer version of Spectrum and has concerns that the interface will continue to work. 

Are there any changes to the CORBA interface or alarm structure on Spectrum 10.2.3 and 10.3, when compared to Spectrum version 10.2.2?

Spectrum 10.x

There are no changes to the CORBA, so they can upgrade it without any impact.