you may also operate as a contractor that only flys part the part 91 flights…. Unless that’s been changed.

part 91 and part 135 both allow flying past 65.
part 91 & 91k have no restrictions except passing all your checks and Medicals. Part 135 has some new age restrictions that apply under certain conditions, I believe it’s to age 70. But in general part 135 is fly till you can’t pass anymore too