BA in History from TESC - limited Clep acceptance?

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I could search the forums, or ask for assistance ... I'll ask:

My 15 year old son is clepping his way through the requirements for a BA in History from TESC. His junior year he plans on taking some courses at a 2-year college (free in the state of MN) and his senior year he might take some courses at a 4-year (again, free for High Schoolers) and to finish up.

Question: Does TESC limit the number of credits from Clep or a 2-year and require a certain amount of credits from a 4-year?

Thanks,
Cheri