I've always used 1 or 2, as some of my instructors live in PA. Once I used the FBI course of fire. They are all similar. It is better to saturate them with your skill level than to use the minimum and have to convince them that it is acceptable.
Hopefully, all of the available official resources make it clear to PD's and judges what is acceptable. Right now it is very subjective.
RPO is Retired Police Officer. They have been allowed to carry for a good number of years. While their requalification process is completely different from civilians, the course of fire is the same and many instructors are certified to do both.