Married to Thai – Work Permit under privaled conditions – anyone heard of this?

I was reading a thai attorney website and it states the following:
If married to Thai life companion
If a foreign employee is married to a Thai citizen, he/she is then entitled to apply for a work permit under privileged conditions from the Department of Employment. For such work permit, only two (2) Thai staff need to be employed for this foreigner.
There is no requirement for a non-immigrant-B-visa in connection with such work permit, the non-immigrant-O-visa is sufficient.
has anyone heard of this? or actually utilized it?