which can be as low as 400' and 1 mile, is issued by the FAA to a certificate holder if they can meet the requirements. Like the 6-6-6 rule, there must be at least 2 crew members and certain equiptment before they will issue that opspec.
That opspec isn't anything special, all the 135 companies I have worked for have that. It's the basic alternate weather mins opspec, and you don't 2 crew to have it issued to your company.
Opspec are what trump the FAR's and only the opspecs!