Deductions & credits

I was referring to the Identify Protection Pin that TT is asking for under Other Tax Situations/Other Return Info,

I now know this is a 6 digit pin issued by the IRS. 
 I can get the IP PIN for myself, but I am the spouse and my SSN is secondary.

Is that sufficient OR does the primary taxpayer (my husband) also need one to file with the IRS electronically??

Note I am referring to the ability to e-file using TT or directly with the IRS with the spouses (only) IP PIN. 

Thanks.