HCTC Elgibility

I receive a pension from the PBGC and should qualify for the HCTC but I'm not completely sure. I receive health insurance from my wife's family plan and she pays 100% of the added premiums needed to cover me..i.e. Her pension plan does not subsidize any part of the coverage for me.  But, the part I'm not sure about is the premiums are paid pre-tax from her pension payments. The instructions make it sound like if any part of the premium payments are pre-tax payments, no matter how much, it make me ineligible for the HCTC. Anyone else had experience with HCTC and pre-tax insurance payments?