Effective beginning on January 1, 1989, or 12 months after January 6, 1988, whichever is later, each System bank shall be an insured System bank and shall be subject to this part. Each System bank that is authorized to commence or resume operations under a subchapter of this chapter shall be an insured System bank from the time of such authorization. A bank resulting from the merger or consolidation of insured System banks shall be an insured System bank.