At my rate of pay I am not willing to do ALL of the homework for any query.
SDS = Secondarily Derived Service
= ALL transformers ( relaxed for dinky transformers )
= ALL on site Gen-Sets
= Solar PV type power has its own NEC section -- which is not quite the same as a typical SDS... typically a dry-type three-phase transformer Delta 480 to Wye 208Y120.
The SDS rules -- and the rationale for bonding across the secondary is in 230 or 232. Use the index at the back, hint.
As for the GEC system... it's in 230 or 250...
The essence of the scheme is that bonding bushings are REQUIRED along the ENTIRE GEC bonding run.
Since there is a common habit of running the GEC of the SDS right on back to the Service -- you'll find bonding bushings used in BOTH directions primary and secondary.
This requirement is limited to STEEL/ EMT raceways, underground or above ground.
If PVC ( non-metallic raceways) is used then the need to eliminate the choking effect is gone.
So many, many Services have no bonding bushings at all: they've been run underground.
The need for bonding bushings also is missing if the GEC system is not encased in EMT/ RMC.
So, it's common for most residential installations to NEVER have a bonding bushing.
The trivial situation of a Service riser -- for an overhead residential Service is excluded from the requirement -- since it's outside the structure -- most unlikely to be touched during a surge -- and it's almost impossible to attain a voltage differential at the riser because it's going STRAIGHT UP out of reach.
If any acronym is obscure -- just post so -- and many here will post a response.