Need help with modding resource and lux trade

[indzasa]

Hello, folks!
I need some general advice with modding.
I am not complete newbee in it (i made one mod for CIV BE, steam link).

So, i wonder, how can i let exchange of strategic and luxury resources be only avaible for nations that have an active internation trade route going?

 

[Rob (R8XFT)]

Moderator Action: The Modding tutorials and reference section of the forum is for completed tutorials and reference guides. All queries and requests for help go in the main Creation and Customisation forum. I've moved this thread to there.
Please read the forum rules: http://forums.civfanatics.com/showthread.php?t=422889