As used in this chapter: “Co-owners with right of survivorship” includes parties to a joint account, joint tenants, tenants by the entireties, and other co-owners of property held under circumstances that entitle one or more to the whole of the property or account on the death of the other or others. “Governing instrument” means a deed, will, trust, insurance or annuity policy, account with POD designation, security registered in beneficiary form (TOD), or pension, profit-sharing, retirement, or similar benefit plan; instrument creating or exercising a power of appointment or a power of attorney; or a donative, appointive, or nominative instrument of any other type. “Payor” means a trustee, insurer, business entity, employer, government, governmental agency, subdivision, or instrumentality, or any other person authorized or obligated by law or a governing instrument to make payments.