At what point is a marriage “legally recognized”?

At what point is a marriage “legally recognized”?

I am going through the interview and hiring process for a job that I will love, but it is benefit-free position. I am engaged to a grad student and will be eligible for his insurance as his spouse, but we are not planning to have our wedding celebration until August and his school's domestic partner benefits are only extended to same-sex couples (rightfully so, things should be equal). Our marriage license will be valid for 60 days, but is that proof enough for me to go ahead and apply for coverage in June? Or do we need to be legally married, certificate signed, etc.? His father, who is a judge, is performing the ceremony and probably would not be comfortable doing a private ceremony before the actual wedding. We live in Indiana, if that makes a difference. Edit: Thanks everyone. It turns out that I'd be paying 100% of the premium to be covered by his (kind of not-great) plan, which will just not work for us financially, so I will probably end up getting individual coverage with a low deductible. This grown up stuff is a pain in the ass.
Mystery flowering shrubbery…ID help requested…

Mystery flowering shrubbery…ID help requested…

Reflectors

Reflectors

My room.

My room.

monarch, and a tomato question

monarch, and a tomato question

Jewels of Opar and Eggplant

Jewels of Opar and Eggplant

Pink walls

Pink walls