Cisco RTU licenses clarification

We will be moving from Cisco WLC 2504 to 3504.

2504 used PAKs and license files.

I understand the 3504 uses RTU or SmartLicensing

My question is about RTU licensing.

If I buy a 3504 with no AP licences, I could “technically” use any amount of licenses (up to 150) without actually paying for them until we get audited/caught by Cisco and fall into a world of pain.

Is this correct?

Sorry if this sounds like a dumb question, but need to be very clear with not so tech savvy people who will be installing the equipment, and I’m still trying to get my head out of the PAK system.

Thanks!