I think the term "adequate strength" is subject to interpretation. Another item in 230.28, though, is not. "Only power service-drop conductors shall be permitted to be attached to a service mast." The phone and cable TV(?) wires have got to go...S
I took closer look and found the clamps to be bolted . the last clamp is 16 inches from the roof, and the 10 foot mast is 5 feet from the top of the meter to the top of the roof.