Bill,
I do agree about a sticky situation. I would enforce two bonding points of an inground if the metal is broken with 2 pieces of plastic such as stairs. As for plastic pools, some inground pools are made up of fiberglass and the only thing that is bonded is the metal coping which holds the liners. Then each piece has to be bonded. No matter what the pool looks like the motor has to be wired as per 680 NEC. Some of the "storeable" pools still use the same motors as the inground pool, so the above ground has to be wired just like the inground pool. Unless you have a double insulated motor (filter) which then has a 25' cord and no place to bond to. By the way, I thought I read somewhere that even if the pool is plastic(fiberglass) there is still suppose to be a bonding wire install for future use.