FIPS mode verification

I'm reading about installed RHEL in FIPS mode and I see this:

To fulfil the strict FIPS 140-2 compliance, add the fips=1 kernel option to the kernel command line during system installation.

But then there is also this:

To turn your system, kernel and user space, into FIPS mode anytime after the system installation, follow these steps:

How do I tell which option was used when I am given a system? How do i verify the system is in strict FIPS mode?