Interest expense for an partnership with passive activity income

Does interest expense for a partnership -- with passive activity (non participation) income -- go on Line 15 on page 1 of 1065?  

 

This partnership receives K-1 ordinary income (Box 1) that goes on its 1065, Line 4 (other partnership income).

 

This partnership only has passive activity (non participation) income.

 

Seems like 13b does not apply since that's for investment interest which apparently is something different, according to instructions to 1065 form.