This Plan and Trust shall be construed and enforced according to the Code, the Act and the laws of the state or commonwealth in which the Employer's (or if there is a corporate Trustee, the Trustee's, or if the Plan is fully insured, the Insurer's) principal office is located (unless otherwise designated in Appendix A to the Adoption Agreement (Special Effective Dates and Other Permitted Elections)), other than its laws respecting choice of law, to the extent not pre-empted by federal law.