Re K-1 where Petitioner can't sponsor alone?

Is it necessary to submit two I-134's, one for petitioner and one for co-sponsor, or just one for co-sponsor? As I recall, before the I-864 was created, you didn't need the petitioner's I-134 if he couldn't be the sponsor. You only submitted one I-134 - the one for the person who is actually sponsoring. That's my question: do I need two I-134's or one? Thank you.

Is it necessary to submit two I-134's, one for petitioner and one for co-sponsor, or just one for co-sponsor? As I recall, before the I-864 was created, you didn't need the petitioner's I-134 if he couldn't be the sponsor. You only submitted one I-134 - the one for the person who is actually sponsoring. That's my question: do I need two I-134's or one? Thank you.