Hello Dean,
can you please elaborate more on your question? What do you mean you want to implement a 'License Determination Strategy'? Are you going to use the standard GTS determination strategy, like legal regulation, tariff code number, country, country group? It solely depends on your requirment.
I didn't see a problem here to maintain the determination strategy for the import license, it is just as the same as the export license.
Regards,
Derek