Decline Health/Labor Insurance With Second Employer, Legal?

I’m here on a JFRV I am able to teach legally and have a full time teaching job. This job is all above board with taxes, health insurance, etc. paid.

I have been offered 3 hours a week at another buxiban (every little bit helps!), they have asked me to sign the following:

Is this legal? I already have health insurance through my main employer, am I obliged to pay the insurances with multiple employers?

Not paying your dues is one thing, but signing something to say that you don’t want to pay them, well, that’s a can of worms that I don’t want to open. My wife says it’s OK, but I’m not so sure. Any advice would be greatly appreciated.

Thanks in advance

My understanding is that only your primary employer, the one on which your ARC depends, is responsible for your NHI payments.

I’m unclear on labor insurance regulations. I was looking through my pay statements and the labor insurance box is blank.