Item # 3 mentions rebar and then states that rebar that is encapsulated with a non-conductive compound is exempt from bonding. Item # 5 mentions metal fittings and then exempts metal fittings that are less that 4" in dimension and do not stick into the wall more than 1". There is no exemption for metal fittings that are encapsulated with a non-conductive compound.
My opinion is that the ladder and the sockets are fittings and shall be bonded whether they are encapsulated or not.
(B) Bonded Parts. The parts specified in 680.26(B)(1) through (B)(7) shall be bonded together using solid copper conductors, insulated covered, or bare, not smaller than 8 AWG
(3) Metallic Components. All metallic parts of the pool structure, including reinforcing metal not addressed in 680.26(B)(1)(a), shall be bonded. Where reinforcing steel is encapsulated with a nonconductive compound, the reinforcing steel shall not be required to be bonded.
(5) Metal Fittings. All metal fittings within or attached to the pool structure shall be bonded. Isolated parts that are not over 100 mm (4 in.) in any dimension and do not penetrate into the pool structure more than 25 mm (1 in.) shall not require bonding.